Android用戶界面程序設計示例

[例1]按鈕和Toast彈出對話框????1

[例2] TextView文本框（1）????3

[例3]TextView文本框（2）????4

[例4]編輯框EditText????4

[例5]單選RadioButton????6

[例6]Toast的用法簡介????8

[例7]多選checkbox????12

[例8]菜單Menu????14

[例9]Dialog對話框????16

[例10]圖片視圖ImageView????19

[例11]圖片按鈕ImageButton????21

界面布局????24

[例12]垂直線性布局????24

[例13]水平線性布局????25

[例14]相對布局????26

絕對布局????27

[例15]表單布局????27

[例16]切換卡(TabWidget)???????? 31

[例1]按鈕和Toast彈出對話框

1、設計界面如圖所示：

2、布局文件：

????<TextView

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="@string/hello"

<Button

android:id="@+id/ok"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="OK"/>

3、Activity界面程序：

public class Activity01 extends Activity {

????public void onCreate(Bundle savedInstanceState) {

????????super.onCreate(savedInstanceState);

????????setContentView(R.layout.main);

????????// 獲得Button對象

????????Button button_ok = (Button) findViewById(R.id.ok);

????????// 設置Button控件監聽器

????????button_ok.setOnClickListener(new Button.OnClickListener() {

????????????public void onClick(View v) {

????????????????// 這里處理事件

????????????????//DisplayToast("點擊了OK按鈕");

Toast.makeText(this, ("點擊了OK按鈕", Toast.LENGTH_SHORT).show();

????????????}

????????});

????}

????public void DisplayToast(String str) {

????????Toast.makeText(this, str, Toast.LENGTH_SHORT).show();

????}

????/* 按鍵按下所觸發的事件 */

????public boolean onKeyDown(int keyCode, KeyEvent event) {

????????switch (keyCode) {

????????case KeyEvent.KEYCODE_DPAD_CENTER:

????????????DisplayToast("按下：中鍵");

????????????break;

????????case KeyEvent.KEYCODE_DPAD_UP:

????????????DisplayToast("按下：上方向鍵");

????????????break;

????????case KeyEvent.KEYCODE_DPAD_DOWN:

????????????DisplayToast("按下：下方向鍵");

????????????break;

????????case KeyEvent.KEYCODE_DPAD_LEFT:

????????????DisplayToast("按下：左方向鍵");

????????????break;

????????case KeyEvent.KEYCODE_DPAD_RIGHT:

????????????DisplayToast("按下：右方向鍵");

????????????break;

????????}

????????return super.onKeyDown(keyCode, event);

????}

????/* 按鍵彈起所觸發的事件 */

????public boolean onKeyUp(int keyCode, KeyEvent event) {

????????switch (keyCode) {

????????case KeyEvent.KEYCODE_DPAD_CENTER:

????????????DisplayToast("彈起：中鍵");

????????????break;

????????case KeyEvent.KEYCODE_DPAD_UP:

????????????DisplayToast("彈起：上方向鍵");

????????????break;

????????case KeyEvent.KEYCODE_DPAD_DOWN:

????????????DisplayToast("彈起：下方向鍵");

????????????break;

????????case KeyEvent.KEYCODE_DPAD_LEFT:

????????????DisplayToast("彈起：左方向鍵");

????????????break;

????????case KeyEvent.KEYCODE_DPAD_RIGHT:

????????????DisplayToast("彈起：右方向鍵");

????????????break;

????????}

????????return super.onKeyUp(keyCode, event);

????}

[例2]TextView（1）

1、設計界面如圖所示：

2、布局文件：

????<TextView

android:id="@+id/textview"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="@string/hello"

3、Activity界面程序的核心語句：

????????textview = (TextView)this.findViewById(R.id.textview);

????????String string = "TextView示例，wangzhiguo";

????????/* 設置文本的顏色 */

????????textview.setTextColor(Color.RED);

????????/* 設置字體大小 */

????????textview.setTextSize(20);

????????/* 設置文字背景 */

????????textview.setBackgroundColor(Color.BLUE);

????????/* 設置TextView顯示的文字 */

????textview.setText(string);

[例3]TextView（2）

設計界面（略）

2、布局文件：

????<TextView

android:id="@+id/textview"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="@string/hello"

android:background="#FFFFFF"

android:textColor="#000000"

android:textSize="20px"

其他一些屬性

android:textColor="#ff0000"

android:textSize="24sp"

android:textStyle="bold"

3、Activity界面程序的核心語句：

setContentView(R.layout.main);//設置內容顯示的xml布局文件 ??

TextView?textView=(TextView)findViewById(R.id.text_view);//取得TextView組件 ??

textView.setTextColor(Color.RED);//設置成紅色 ??

textView.setTextSize(TypedValue.COMPLEX_UNIT_SP,?24f);//設置成24sp ??

textView.setTypeface(Typeface.defaultFromStyle(Typeface.BOLD));//加粗 ??

android:autoLink="web"??

android:autoLink="phone"

android:autoLink="all"

實現跑馬燈效果

<TextView? ??
????android:id="@+id/text_view"??
????android:autoLink="all"??
????android:layout_width="fill_parent"? ??
????android:layout_height="wrap_content"??
????android:text="@string/hello"??
????android:ellipsize="marquee"? ??
????android:focusable="true"? ??
????android:marqueeRepeatLimit="marquee_forever"? ??
????android:focusableInTouchMode="true"? ??
android:singleLine="true"
????android:scrollHorizontally="true"/>??
</LinearLayout>??

?? ?

[例4]編輯框EditText

1、設計界面如圖所示：

2、布局文件：

????<string name="hello">文本框中內容是</string>

<string name="message">請輸入賬號</string>

<string name="app_name">EditText_wangzhiguo</string>

????<TextView

????android:id="@+id/TextView01"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="@string/hello"

???? <EditText

???? android:id="@+id/EditText01"

???? android:layout_width="fill_parent"

???? android:layout_height="wrap_content"

???? android:textSize="18sp"

???? android:layout_x="29px"

???? android:hint="@string/message"

???? android:layout_y="33px"

???? />

3、Activity界面程序的核心語句：

super.onCreate(savedInstanceState);

????????setContentView(R.layout.main);

????????m_TextView = (TextView) findViewById(R.id.TextView01);

????????m_EditText = (EditText) findViewById(R.id.EditText01);

????????m_TextView.setTextSize(20);

????????/**

???????? * 設置當m_EditText中為空時提示的內容在XML中同樣可以實現：android:hint="請輸入賬號"

???????? */

????????// m_EditText.setHint("請輸入賬號");

????????/* 設置EditText事件監聽 */

????????m_EditText.setOnKeyListener(new EditText.OnKeyListener() {

????????????@Override

????????????public boolean onKey(View arg0, int arg1, KeyEvent arg2) {

????????????????// 得到文字，將其顯示到TextView中???? m_TextView.setText(Activity01.this.getString(R.string.hello) +

m_EditText.getText().toString());

???? return false;

????}

});

補充：關于EditText的一些細節操作

android:hint="請輸入用戶名..." 提示屬性

?android:textColorHint="#238745" 更改提示顏色

android:enabled="false" 不可編輯

android:lines="10" 通過設定行高，實現文本域功能

android:maxLength="40"??最大內容長度

android:password="true" 要求輸入密碼

android:phoneNumber="true" 只能輸入電話號碼

droid:numeric="signed"

android:inputType="date" 指定輸入類型

android:imeOptions="actionSearch" Enter鍵圖標設置

actionUnspecified? 未指定，對應常量EditorInfo.IME_ACTION_UNSPECIFIED.效果：
actionNone 沒有動作,對應常量EditorInfo.IME_ACTION_NONE 效果：
actionGo 去往，對應常量EditorInfo.IME_ACTION_GO 效果：
actionSearch 搜索，對應常量EditorInfo.IME_ACTION_SEARCH 效果：
actionSend 發送，對應常量EditorInfo.IME_ACTION_SEND 效果：
actionNext 下一個，對應常量EditorInfo.IME_ACTION_NEXT 效果：
actionDone 完成，對應常量EditorInfo.IME_ACTION_DONE 效果：

課堂練習

作業提示??

//監聽EditText文本的回車鍵 ??

?editText.setOnEditorActionListener(new?OnEditorActionListener()?{

????????????@Override??

?public?boolean?onEditorAction(TextView?v,?int?actionId,?KeyEvent?event)?{ ??

??????Toast.makeText(HelloEditText.this,?String.valueOf(actionId),?Toast.LENGTH_SHORT).show(); ??

????? ?return?false; ??

?????} ??

??}); ??

??//獲取EditText文本 ?

public?void?onClick(View?v)?{ ??

?????????????Toast.makeText(HelloEditText.this,?editText.getText().toString(),?Toast.LENGTH_SHORT).show(); ??

Button?all=(Button)findViewById(R.id.btn_all); ??

???all.setOnClickListener(new?OnClickListener()?{ ??

????????????@Override??

??????????public?void?onClick(View?v)?{ ??

????????????editText.selectAll(); ??

?????????} ??

????}); ??

//讓EditText全選 ??

?Button?all=(Button)findViewById(R.id.btn_all); ??

????all.setOnClickListener(new?OnClickListener()?{ ??

????????@Override??

??????public?void?onClick(View?v)?{ ??

?????????????editText.selectAll(); ??

???????} ??

????}); ??

//從第2個字符開始選擇EditText文本

public?void?onClick(View?v)?{ ??

????????Editable?editable=editText.getText(); ??

??????? Selection.setSelection(editable,?1,editable.length()); ??

??????} ??

public?void?onClick(View?v)?{ ??

??int?start=editText.getSelectionStart(); ??

??int?end=editText.getSelectionEnd(); ??

??CharSequence?selectText=editText.getText().subSequence(start,?end); ??

?? ?oast.makeText(HelloEditText.this,?selectText,?Toast.LENGTH_SHORT).show(); ??

? ????} ??

/** ?

?????*?交換兩個變量的值 ?

?????*?@param?start?變量初值 ?

?????*?@param?end?變量終值 ?

?????*/??

????protected?void?switchIndex(int?start,?int?end)?{ ??

????????int?temp=start; ??

????????start=end; ??

????????end=temp; ??

????} ??

[例5]單選RadioButton

1、設計界面如圖所示：

2、布局文件：

<string name="hello">Android底層是基于什么操作系統？</string>

<string name="app_name">單選RadioButton_wangzhiguo</string>

<string name="RadioButton1">Windows</string>

<string name="RadioButton2">Linux</string>

</resources>

????<TextView

????android:id="@+id/TextView01"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="@string/hello"

<RadioGroup

android:id="@+id/RadioGroup01"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:orientation="vertical"

android:layout_x="3px"

android:layout_y="54px"

<RadioButton

android:id="@+id/RadioButton1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="@string/RadioButton1"

<RadioButton

android:id="@+id/RadioButton2"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="@string/RadioButton2"

<RadioButton

android:id="@+id/RadioButton3"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="@string/RadioButton3"

<RadioButton

android:id="@+id/RadioButton4"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="@string/RadioButton4"

</RadioGroup>

3、Activity界面程序的核心語句：

????/**

???????? * 獲得TextView對象獲得RadioGroup對象獲得4個RadioButton對象

???????? */

????????m_TextView = (TextView) findViewById(R.id.TextView01);

????????m_RadioGroup = (RadioGroup) findViewById(R.id.RadioGroup01);

????????m_Radio1 = (RadioButton) findViewById(R.id.RadioButton1);

????????m_Radio2 = (RadioButton) findViewById(R.id.RadioButton2);

????????m_Radio3 = (RadioButton) findViewById(R.id.RadioButton3);

????????m_Radio4 = (RadioButton) findViewById(R.id.RadioButton4);

????????/* 設置事件監聽 */

????????m_RadioGroup

????????????????.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {

????????@Override

????public void onCheckedChanged(RadioGroup group, int checkedId) {

????????????// TODO Auto-generated method stub

????????if (checkedId == m_Radio2.getId()) {

????????????DisplayToast("正確答案：" + m_Radio2.getText()

????????????????????????+ "，恭喜你，回答正確！");

????????????} else {

???????????????????? DisplayToast("請注意，回答錯誤！");

????????????????????}

????????????}

????????});

????}

????/* 顯示Toast */

????public void DisplayToast(String str) {

????????Toast toast = Toast.makeText(this, str, Toast.LENGTH_LONG);

????????// 設置toast顯示的位置

????????toast.setGravity(Gravity.TOP, 0, 220);

????????// 顯示該Toast

????????toast.show();

}

[例6]Toast的用法簡介

[例6_1] 彈出式提示框的默認樣式

設計界面如圖所示：

2、核心語句：

Toast.makeText(getApplicationContext(), "默認Toast樣式",
?????Toast.LENGTH_SHORT).show();

?[例6_2] 自定義提示框顯示位置

設計界面如圖所示：

2、核心語句：

toast = Toast.makeText(getApplicationContext(),
?????"自定義位置Toast", Toast.LENGTH_LONG);
???toast.setGravity(Gravity.CENTER, 0, 0);
???toast.show();

? ?

[例6_3]帶圖片提示框效果

設計界面如圖所示：

?2、核心語句：

toast = Toast.makeText(getApplicationContext(),
?????"帶圖片的Toast", Toast.LENGTH_LONG);
???toast.setGravity(Gravity.CENTER, 0, 0);
???LinearLayout toastView = (LinearLayout) toast.getView();
???ImageView imageCodeProject = new ImageView(getApplicationContext());
???imageCodeProject.setImageResource(R.drawable.icon);
???toastView.addView(imageCodeProject, 0);
???toast.show();

?[例6_4]帶圖片的自定義提示框效果

1、設計界面如圖所示：

2、核心語句：

LayoutInflater inflater = getLayoutInflater();
???View layout = inflater.inflate(R.layout.custom,
?????(ViewGroup) findViewById(R.id.llToast));
???ImageView image = (ImageView) layout
?????.findViewById(R.id.tvImageToast);
???image.setImageResource(R.drawable.icon);
???TextView title = (TextView) layout.findViewById(R.id.tvTitleToast);
???title.setText("Attention");
???TextView text = (TextView) layout.findViewById(R.id.tvTextToast);
???text.setText("完全自定義Toast");
???toast = new Toast(getApplicationContext());
???toast.setGravity(Gravity.RIGHT | Gravity.TOP, 12, 40);
???toast.setDuration(Toast.LENGTH_LONG);
???toast.setView(layout);
???toast.show();

[例6_5] 其他線程

1、設計界面如圖所示：

核心語句：

new Thread(new Runnable() {
??? ?public void run() {
???? ?showToast();
??? ?}
???}).start();

[例7]多選checkbox

1、設計界面如圖所示：

2、布局文件：

<string name="hello">調查：你喜歡Android的原因？</string>

<string name="app_name">CheckBox_wangzhiguo</string>

<string name="CheckBox1">無界限的應用程序</string>

<string name="CheckBox2">應用程序是在平等的條件下創建的</string>

<string name="CheckBox3">應用程序可以輕松地嵌入網絡</string>

<string name="CheckBox4">應用程序可以并行運行</string>

<TextView

????android:id="@+id/TextView1"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="@string/hello"

<CheckBox

android:id="@+id/CheckBox1"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="@string/CheckBox1"

</CheckBox>

<CheckBox

android:id="@+id/CheckBox4"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="@string/CheckBox4"

</CheckBox>

<Button

android:id="@+id/button1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="提交"

</Button>

3、核心語句：

m_CheckBox1.setOnCheckedChangeListener(new CheckBox.OnCheckedChangeListener() {

????????????????????@Override

????????????public void onCheckedChanged(CompoundButton buttonView,

????????????????boolean isChecked) {

????????????????if (m_CheckBox1.isChecked()) {

????????????????????DisplayToast("你選擇了：" + m_CheckBox1.getText());

????????????????????}

????????????????}

????????});

????????m_Button1.setOnClickListener(new Button.OnClickListener() {

????????????public void onClick(View v) {

????????????????int num = 0;

????????????????if (m_CheckBox1.isChecked()) {

????????????????????num++;

????????????????}

????????????????if (m_CheckBox2.isChecked()) {

????????????????????num++;

????????????????}

????????????????if (m_CheckBox3.isChecked()) {

????????????????????num++;

????????????????}

????????????????if (m_CheckBox4.isChecked()) {

????????????????????num++;

????????????????}

????????????????DisplayToast("謝謝參與！你一共選擇了" + num + "項！");

????????????}

????????});

[例8] 菜單Menu

1、設計界面如圖所示：

2、布局文件：

<string name="hello">主界面,點擊關于會跳到另一個界面!（Activity01）</string>

<string name="hello2">關于\nAndroid Menu使用范例！（Activity02）</string>

<string name="app_name">Menu_wangzhiguo</string>

????<string name="ok">切換Activity</string>

????<string name="back">返回</string>

創建menu文件夾，其中放入menu.xml

<item android:id="@+id/about"

android:title="關于" />

<item android:id="@+id/exit"

android:title="退出" />

</menu>

創建兩個main.xml，兩個activity，并且在AndroidManifest.xml中加入

3、Activity界面程序的核心語句：

啟用菜單

/* 創建menu */

????public boolean onCreateOptionsMenu(Menu menu) {

????????MenuInflater inflater = getMenuInflater();

????????// 設置menu界面為res/menu/menu.xml

????????inflater.inflate(R.menu.menu, menu);

????????return true;

????}

????/* 處理菜單事件 */

????public boolean onOptionsItemSelected(MenuItem item) {

????????// 得到當前選中的MenuItem的ID,

????????int item_id = item.getItemId();

????????switch (item_id) {

????????case R.id.about:

????????????/* 新建一個Intent對象 */

????????????Intent intent = new Intent();

????????????/* 指定intent要啟動的類 */

????????????intent.setClass(Activity01.this, Activity02.class);

????????????/* 啟動一個新的Activity */

????????????startActivity(intent);

????????????/* 關閉當前的Activity */

????????????Activity01.this.finish();

????????????break;

????????case R.id.exit:

????????????Activity01.this.finish();

????????????break;

????????}

????????return true;

????}

啟用菜單的另外一種方式

????public boolean onCreateOptionsMenu(Menu menu) {

????????// 為menu添加內容

????????menu.add(0, 0, 0, R.string.ok);

????????menu.add(0, 1, 1, R.string.back);

????????return true;

????}

[例9] Dialog對話框

1、設計界面如圖所示：

2、核心語句：

????Dialog dialog = new AlertDialog.Builder(this).

????????????setTitle("exit").setMessage("你確定退出程序嗎").setNegativeButton("取消", new DialogInterface.OnClickListener(){

????????????????????@Override

????????????????????public void onClick(DialogInterface dialog, int which)

//????????????????????????Acitivity01.this.finish();

????????????????????????Acitivity01.this.loginDialog().show();

????????????????????????

????????????????????}}

????????????).setPositiveButton("ok", new DialogInterface.OnClickListener(){

????????????????????@Override

????????????????????public void onClick(DialogInterface dialog, int which) {

????????????????????????pDialog = ProgressDialog.show(Acitivity01.this, "請稍等", "您正在登陸", true);

????????????????????????new Thread(){

????????????????????????????public void run() {

????????????????????????????????try {

????????????????????????????????????Thread.sleep(3000);

????????????????????????????????} catch (InterruptedException e) {

????????????????????????????????????// TODO Auto-generated catch block

????????????????????????????????????e.printStackTrace();

????????????????????????????????}

????????????????????????????????pDialog.dismiss();

????????????????????????????};

????????????????????????}.start();

????????????????????????Acitivity01.this.finish();

????????????????????}}).create();

????????dialog.show();

public Dialog loginDialog(){

????LayoutInflater factory = LayoutInflater.from(Acitivity01.this);

????View dialogView = factory.inflate(R.layout.dialog, null);

????Dialog dialog = null;

????AlertDialog.Builder builder = new AlertDialog.Builder(Acitivity01.this);

????builder.setTitle("this is a login view");

????builder.setView(dialogView);

????builder.setPositiveButton("ok", null);

????builder.setNegativeButton("cancel", null);

????dialog = builder.create();

????return dialog;

}

[例10] 圖片視圖ImageView

1、設計界面如圖所示：

2、布局文件：

<ImageView

????android:id="@+id/ImageView01"

????android:layout_width="wrap_content"

????android:layout_height="wrap_content"

????>

</ImageView>

<TextView

????android:id="@+id/TextView01"

????android:layout_below="@id/ImageView01"

????android:layout_width="wrap_content"

????android:layout_height="wrap_content"

3、核心語句：

// 獲得ImageView的對象

????????imageview = (ImageView) this.findViewById(R.id.ImageView01);

????????textview = (TextView) this.findViewById(R.id.TextView01);

????????// 設置imageview的圖片資源。同樣可以再xml布局中像下面這樣寫

????????// android:src="@drawable/logo"

????????imageview.setImageResource(R.drawable.logo);

????????// 設置imageview的Alpha值，Alpha值表示透明度，如：全透明，半透明

????????imageview.setAlpha(image_alpha);

????????// 開啟一個線程來讓Alpha值遞減

????????new Thread(new Runnable() {

????????????public void run() {

????????????????while (isrung) {

????????????????????try {

????????????????????????Thread.sleep(200);

????????????????????????// 更新Alpha值

????????????????????????updateAlpha();

????????????????????} catch (InterruptedException e) {

????????????????????????e.printStackTrace();

????????????????????}

????????????????}

????????????}

????????}).start();

????????// 接受消息之后更新imageview視圖

????????mHandler = new Handler() {

????????????@Override

????????????public void handleMessage(Message msg) {

????????????????super.handleMessage(msg);

????????????????imageview.setAlpha(image_alpha);

????????????????textview.setText("現在alpha值是：" + Integer.toString(image_alpha));

????????????????// 更新

????????????????imageview.invalidate();

????????????}

????????};

????}

????public void updateAlpha() {

????????if (image_alpha - 7 >= 0) {

????????????image_alpha -= 7;

????????} else {

????????????image_alpha = 0;

????????????isrung = false;

????????}

????????// 發送需要更新imageview視圖的消息

????????mHandler.sendMessage(mHandler.obtainMessage());

????}

列表視圖ListView

1 參考幫助文檔的一種寫法

public class MainActivity extends ListActivity {

String[] strs = {"aa1","bb2","cc3"};

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

ArrayAdapter<String> aa = new ArrayAdapter<String>(this, R.layout.simple_list_item_1, strs);

setListAdapter(aa);

ListView lv = this.getListView();

lv.setOnItemClickListener(new OnItemClickListener() {

????????????public void onItemClick(AdapterView<?> parent, View view,

????????????????????int position, long id) {

????????????????Toast.makeText(MainActivity.this, strs[position], Toast.LENGTH_LONG).show();

????????????????

????????????}

????????});

}

監聽還可以這樣加

protected void onListItemClick(ListView l, View v, int position, long id) {

????// TODO Auto-generated method stub

????super.onListItemClick(l, v, position, id);

????Toast.makeText(this, strs[position], Toast.LENGTH_LONG).show();

}

第二種ListView的寫法

<ListView

android:id="@+id/ListView01"

android:layout_width="fill_parent"

android:layout_height="wrap_content"/>

public class TestListView2 extends Activity {

????ListView lv;

????String[] strs = { "Java", "JavaME", "JavaEE", "Android" };

????@Override

????protected void onCreate(Bundle savedInstanceState) {

????????super.onCreate(savedInstanceState);

????????setContentView(R.layout.test_listview);

????????

????????lv = (ListView)findViewById(R.id.ListView01);

????????

????????ArrayAdapter<String> aa = new

????????ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,strs);

????????lv.setAdapter(aa);

????????

????????lv.setOnItemClickListener(new OnItemClickListener() {

????????????public void onItemClick(AdapterView<?> parent, View view,

????????????????????int position, long id) {

????????????????Toast.makeText(TestListView2.this, strs[position], Toast.LENGTH_LONG).show();

????????????}

????????});

????}

}

第三種ListView的寫法

<ImageView android:id="@+id/ImageView01"

android:layout_width="wrap_content"

android:layout_height="wrap_content"/>

<TextView

android:text=""

android:id="@+id/text_TextView01"

android:layout_width="wrap_content"

android:layout_height="wrap_content"/>

public class TestListView3 extends ListActivity {

????@Override

????protected void onCreate(Bundle savedInstanceState) {

????????super.onCreate(savedInstanceState);

????????setListAdapter(new MyAdapter());

????}

????class MyAdapter extends BaseAdapter {

????????String[] strs = { "Java", "JavaME", "JavaEE", "Android" };

????????LayoutInflater li = LayoutInflater.from(getApplicationContext());

????????public int getCount() {

????????????return strs.length;

????????}

????????public Object getItem(int position) {

????????????return null;

????????}

????????public long getItemId(int position) {

????????????return 0;

????????}

????????public View getView(int position, View convertView, ViewGroup parent) {

????????????View v = li.inflate(R.layout.listview_item, null);

????????????ImageView iv = (ImageView)v.findViewById(R.id.ImageView01);

????????????TextView tv = (TextView)v.findViewById(R.id.text_TextView01);

????????????tv.setText(strs[position]);

????????????iv.setImageResource(R.drawable.icon);

????????????return v;

????????}

????}

}

[例11] 圖片按鈕ImageButton

1、設計界面如圖所示：

2、布局文件：

m_TextView = (TextView) findViewById(R.id.TextView01);

????????// 分別取得4個ImageButton對象

????????m_ImageButton1 = (ImageButton) findViewById(R.id.ImageButton01);

????????m_ImageButton2 = (ImageButton) findViewById(R.id.ImageButton02);

????????m_ImageButton3 = (ImageButton) findViewById(R.id.ImageButton03);

????????m_ImageButton4 = (ImageButton) findViewById(R.id.ImageButton04);

????????// 分別設置所使用的圖標

????????// m_ImageButton1是在xml布局中設置的，這里就暫時不設置了

????????m_ImageButton2.setImageDrawable(getResources().getDrawable(

????????????????R.drawable.button2));

????????m_ImageButton3.setImageDrawable(getResources().getDrawable(

????????????????R.drawable.button3));

????????m_ImageButton4.setImageDrawable(getResources().getDrawable(

????????????????android.R.drawable.sym_call_incoming));

????????// 以下分別為每個按鈕設置事件監聽setOnClickListener

????m_ImageButton1.setOnClickListener(new Button.OnClickListener() {

????????public void onClick(View v) {

????????????// 對話框

????????Dialog dialog = new AlertDialog.Builder(Activity01.this)

????????????????????????.setTitle("提示").setMessage("我是ImageButton1")

????????????????????????.setPositiveButton("確定",

????????????????????????new DialogInterface.OnClickListener() {

????????????????????????????public void onClick(DialogInterface dialog,

????????????????????????????????????????int whichButton) {

????????????????????????????????????}

????????????????????????????}).create();// 創建按鈕

????????????????dialog.show();

????????????}

????});

m_ImageButton2.setOnClickListener(new Button.OnClickListener() {

????public void onClick(View v) {

????????Dialog dialog = new AlertDialog.Builder(Activity01.this)

????????????.setTitle("提示").setMessage(

????????????"我是ImageButton2，我要使用ImageButton3的圖標")

????????????.setPositiveButton("確定",

????????????????new DialogInterface.OnClickListener() {

????????????????????public void onClick(DialogInterface dialog,

????????????????????int whichButton) {m_ImageButton2

???? .setImageDrawable(getResources()

???????????????????? .getDrawable(R.drawable.button3));

????????????????????}

????????????}).create();// 創建按鈕

????????dialog.show();

????}

});

m_ImageButton3.setOnClickListener(new Button.OnClickListener() {

????public void onClick(View v) {

????Dialog dialog = new AlertDialog.Builder(Activity01.this)

????????.setTitle("提示")

????????.setMessage("我是ImageButton3，我要使用系統打電話圖標")

????????.setPositiveButton("確定",

????????????new DialogInterface.OnClickListener() {

????????????????public void onClick(DialogInterface dialog,

????????????????int whichButton) {

m_ImageButton3.setImageDrawable(getResources()

????????????????????????.getDrawable(???????????????????????? android.R.drawable.sym_action_call));

????????????????????????????}

????????????????}).create();// 創建按鈕

????????????dialog.show();

????????}

????});

m_ImageButton4.setOnClickListener(new Button.OnClickListener() {

????public void onClick(View v) {

????????Dialog dialog = new AlertDialog.Builder(Activity01.this)

????????????.setTitle("提示").setMessage("我是使用的系統圖標！")

????????????.setPositiveButton("確定",

????????????????new DialogInterface.OnClickListener() {

????????????????????public void onClick(DialogInterface dialog,

????????????????????????????int whichButton) {

????????????????????????????}

????????????????????}).create();// 創建按鈕

????????????dialog.show();

????????}

});

界面布局

[例12] 垂直線性布局

設計界面如圖所示：

2、布局文件：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:orientation="vertical"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

????<TextView

???? android:text="第一行"

???? android:gravity="top"

???? android:textSize="15pt"

???? android:background="#aa0000"

???? android:layout_width="fill_parent"

???? android:layout_height="wrap_content"

???? android:layout_weight="3"/> //重量級，越大則在界面中所占比例也越多（即四行所占比例會把界面全部占滿，重量級越多的占得比例越多）

????

????<TextView

???? android:text="第二行"

???? android:textSize="15pt"

???? android:gravity="right"

???? android:background="#00aa00"

???? android:layout_width="fill_parent"

???? android:layout_height="wrap_content"

???? android:layout_weight="2"/>

????

????<TextView

???? android:text="第三行"

???? android:textSize="15pt"

???? android:gravity="center_vertical"

???? android:background="#0000aa"

???? android:layout_width="fill_parent"

???? android:layout_height="wrap_content"

???? android:layout_weight="1"/>

????<TextView

???? android:text="第四行"

???? android:textSize="15pt"

???? android:gravity="center_vertical"

???? android:background="#aaaa00"

???? android:layout_width="fill_parent"

???? android:layout_height="wrap_content"

???? android:layout_weight="0"/>

</LinearLayout>

[例13] 水平線性布局

1、設計界面如圖所示：

2、布局文件：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:orientation="horizontal"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

????<TextView

???? android:text="第一列"

???? android:gravity="center_horizontal"

???? android:background="#aa0000"

???? android:layout_width="wrap_content"

???? android:layout_height="fill_parent"

???? android:layout_weight="1"/>

????

????<TextView

???? android:text="第二列"

???? android:gravity="center_horizontal"

???? android:background="#00aa00"

???? android:layout_width="wrap_content"

???? android:layout_height="fill_parent"

???? android:layout_weight="1"/>

????

????<TextView

???? android:text="第三列"

???? android:gravity="center_horizontal"

???? android:background="#0000aa"

???? android:layout_width="wrap_content"

???? android:layout_height="fill_parent"

???? android:layout_weight="1"/>

????

????<TextView

???? android:text="第四列"

???? android:gravity="center_horizontal"

???? android:background="#aaaa00"

???? android:layout_width="wrap_content"

???? android:layout_height="fill_parent"

???? android:layout_weight="1"/>

</LinearLayout>

[例14] 相對布局

1、設計界面如圖所示：

2、布局文件：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="fill_parent"

android:layout_height="fill_parent">

<TextView

android:id="@+id/label"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="請輸入:"/>

<EditText

android:id="@+id/entry"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:background="@android:drawable/editbox_background"

android:layout_below="@id/label"/>// layout_below表示該標簽放在TextView標簽下面

<Button

android:id="@+id/ok"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_below="@id/entry"

android:layout_alignParentRight="true" //靠右

android:layout_marginLeft="10dip" //距左邊標簽間隔10個單位

android:text="確定" />

<Button

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_toLeftOf="@id/ok" //在id=ok標簽的左邊

android:layout_alignTop="@id/ok" //頂部和id=ok的標簽對齊

android:text="取消" />

</RelativeLayout>

絕對布局

[例15] 表單布局

1、設計界面如圖所示：

2、布局文件：

<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:stretchColumns="1">

//第一列可以延伸、擴展。這樣第一列和第二列不會緊挨著排列

<TextView

android:layout_column="1" //指明該列為第一列，默認為第0列

android:text="打開..."

android:padding="3dip" />

<TextView

android:text="Ctrl-O"

android:gravity="right" //該視圖靠右邊界面

android:padding="3dip" />

</TableRow>

<TextView

android:layout_column="1"

android:text="保存..."

android:padding="3dip" />

<TextView

android:text="Ctrl-S"

android:gravity="right"

android:padding="3dip" />

</TableRow>

<TextView

android:layout_column="1"

android:text="另存為..."

android:padding="3dip" />

<TextView

android:text="Ctrl-Shift-S"

android:gravity="right"

android:padding="3dip" />

</TableRow>

<View

android:layout_height="2dip"

android:background="#FF909090" />

<TextView

android:text="*"

android:padding="3dip" />

<TextView

android:text="導入..."

android:padding="3dip" />

</TableRow>

<TextView

android:text="*"

android:padding="3dip" />

<TextView

android:text="導出..."

android:padding="3dip" />

<TextView

android:text="Ctrl-E"

android:gravity="right"

android:padding="3dip" />

</TableRow>

<View

android:layout_height="2dip"

android:background="#FF909090" />

<TextView

android:layout_column="1"

android:text="退出"

android:padding="3dip" />

</TableRow>

</TableLayout>

1、設計界面如圖所示：

2、布局文件：

<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:stretchColumns="0,1,2"

android:shrinkColumns="1,2"

<TextView

android:text="Table Test"

android:gravity="center"/>

<TextView

????android:layout_column="1"

android:text="姓名"

android:gravity="left"/>

<TextView

android:text="基本信息"

android:gravity="center"/>

</TableRow>

<TextView

android:text=" 1 "

android:gravity="center"/>

<TextView

android:text="hoyah"

android:gravity="left"/>

<TextView

android:text="Wuhan University"

android:gravity="right"/>

</TableRow>

<TextView

android:text=" 2 "

android:gravity="center"/>

<TextView

android:text="Google"

android:gravity="left"/>

<TextView

android:text="hello Google"

android:gravity="right"/>

</TableRow>

<TextView

android:text="3"

android:gravity="center"/>

<TextView

android:text="Android"

android:gravity="left"/>

<TextView

android:text="Android OS"

android:gravity="right"/>

</TableRow>

</TableLayout>

布局講解:

? ? android:collapse="1

隱藏該TableLayout里的TableRow的列1，即第2列（從0開始計算），若有多列要隱藏，用"，"隔開。

? ? android:stretchColumns="0,1,2"

設置列0、1、2為可伸展列。

? ? android:shrinkColumns="1,2"

設置列1、2為可收縮列。

? ? android:background="@drawable/picture_name"

本例中沒有涉及此屬性，它是要設置當前view 的背景圖片，圖片文件應該放在res文件夾下。

[例16] 切換卡(TabWidget)

1、設計界面如圖所示：

2、布局文件：

<?xml version="1.0" encoding="utf-8"?>

<TabHost xmlns:android="http://schemas.android.com/apk/res/android"

android:id="@android:id/tabhost"

android:layout_width="fill_parent"

android:layout_height="fill_parent">

<LinearLayout

android:orientation="vertical"

android:layout_width="fill_parent"

android:layout_height="fill_parent">

<TabWidget

android:id="@android:id/tabs"

android:layout_width="fill_parent"

android:layout_height="wrap_content" />

<FrameLayout

android:id="@android:id/tabcontent"

android:layout_width="fill_parent"

android:layout_height="fill_parent">

<TextView

android:id="@+id/textview1"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:text="this is a tab" />

<TextView

android:id="@+id/textview2"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:text="this is another tab" />

<TextView

android:id="@+id/textview3"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:text="this is a third tab" />

????</FrameLayout>

</LinearLayout>

</TabHost>

3、核心語句：

public class Activity01 extends TabActivity {

????// 聲明TabHost對象

????TabHost mTabHost;

????/** Called when the activity is first created. */

????@Override

????public void onCreate(Bundle savedInstanceState) {

????????super.onCreate(savedInstanceState);

????????setContentView(R.layout.main);

????????// 取得TabHost對象

????????mTabHost = getTabHost();

????????/* 為TabHost添加標簽 */

????????// 新建一個newTabSpec(newTabSpec)

????????// 設置其標簽和圖標(setIndicator)

????????// 設置內容(setContent)

????mTabHost.addTab(mTabHost.newTabSpec("tab_test1").setIndicator("TAB 1",????getResources().getDrawable(R.drawable.img1)).setContent(

???????????????? R.id.textview1));

????mTabHost.addTab(mTabHost.newTabSpec("tab_test2").setIndicator("TAB 2", getResources().getDrawable(R.drawable.img2)).setContent(

???????????????? R.id.textview2));

mTabHost.addTab(mTabHost.newTabSpec("tab_test3").setIndicator("TAB 3",????getResources().getDrawable(R.drawable.img3)).setContent(

???????????? ???? R.id.textview3));

????????// 設置TabHost的背景顏色

????????mTabHost.setBackgroundColor(Color.argb(150, 22, 70, 150));

????????// 設置TabHost的背景圖片資源

????????// mTabHost.setBackgroundResource(R.drawable.bg0);

????????// 設置當前顯示哪一個標簽

????mTabHost.setCurrentTab(0);

????????// 標簽切換事件處理，setOnTabChangedListener

????mTabHost.setOnTabChangedListener(new OnTabChangeListener() {

????// TODO Auto-generated method stub

????????????@Override

????public void onTabChanged(String tabId) {

????????Dialog dialog = new AlertDialog.Builder(Activity01.this)

????????????????.setTitle("提示").setMessage("當前選中：" + tabId + "標簽")

????????????????.setPositiveButton("確定",

???????????????? new DialogInterface.OnClickListener() {

????????????????????public void onClick(DialogInterface dialog,

????????????????????????int whichButton) {

????????????????????????????????dialog.cancel();

????????????????????????????}

????????????????????}).create();// 創建按鈕

????????????dialog.show();

???? ????}

???? });

}

轉載于:https://www.cnblogs.com/zhoujn/p/4405830.html