Activity跳轉

本例中MainActivity為：FirstActivity.java

FirstActivity如下：

package com.wyl.intentmultiactivitytest;import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;public class FirstActivity extends Activity {//Button btn01;Button btn02;EditText et;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.firstctivity);// 綁定頁面btn01 = (Button) findViewById(R.id.button1);btn02 = (Button) findViewById(R.id.button2);et = (EditText)findViewById(R.id.editText1);btn01.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stub// 1.上下文對象，Context// 2.目標文件Intent intent = new Intent(FirstActivity.this,SecondActivity.class);System.out.println("======kaishi :====");startActivity(intent);// 實現跳轉到第二個頁面}});btn02.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stub// 1.上下文對象，Context// 2.目標文件Intent intent = new Intent(FirstActivity.this,SecondActivity.class);System.out.println("======第一個頁面的第二種跳轉kaishi :====");startActivityForResult(intent, 1);;// 實現跳轉到第二個頁面}});}@Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent data) {// TODO Auto-generated method stubsuper.onActivityResult(requestCode, resultCode, data);if(requestCode==1&&resultCode==2){String plnr1 = data.getStringExtra("plnr");String plnr2 = data.getExtras().getString("plnr");System.out.println("==========:"+plnr1+",plnr2:"+plnr2);et.setText("data.getStringExtra('plnr1')"+plnr1+",plnr2 = data.getExtras().getString('plnr')的方式"+plnr2);}}
}

　　SecondActivity:

package com.wyl.intentmultiactivitytest;import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;public class SecondActivity extends Activity {Button btn01;Button btn02;EditText et;@Overrideprotected void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);setContentView(R.layout.second_activity);// 綁定頁面System.out.println("=====wo shi the second yemian =====");btn01 = (Button) findViewById(R.id.button21);btn02 = (Button) findViewById(R.id.button22);et = (EditText)findViewById(R.id.editText01);btn01.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubIntent intent = new Intent(SecondActivity.this, FirstActivity.class);System.out.println("==cong dier tiaodao diyiye==");startActivity(intent);}});btn02.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubIntent intent = new Intent();String content = et.getText().toString();//獲取評論的內容intent.putExtra("plnr", content);//2是狀態碼，隨便自己設置，用來判斷是哪個頁面的返回值，自己不弄混了就行setResult(2, intent);	//這是最關鍵的一步，Toast.makeText(SecondActivity.this, intent.getExtras().getString("plnr"),1000);finish();//關閉該頁面，就會自動返回到了第一頁了。}});}
}

　　相關的layout文件：

firstctivity.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="vertical" ><Buttonandroid:id="@+id/button1"android:layout_width="match_parent"android:layout_height="wrap_content"android:text="new Intent(context,目標activity.class),startActivity(intent)方式跳轉" /><Buttonandroid:id="@+id/button2"android:layout_width="match_parent"android:layout_height="wrap_content"android:text="第二種方式跳轉" /><EditTextandroid:id="@+id/editText1"android:layout_width="match_parent"android:layout_height="wrap_content"android:ems="10" android:hint="我只是個提示框框而已"><requestFocus /></EditText></LinearLayout>

　　second_activity.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="vertical" ><EditTextandroid:id="@+id/editText01"android:layout_width="match_parent"android:layout_height="wrap_content"android:hint="錄入要返回到第一頁的內容" /><Buttonandroid:id="@+id/button21"android:layout_width="match_parent"android:layout_height="wrap_content"android:text="我是第二個activity頁面" /><Buttonandroid:id="@+id/button22"android:layout_width="match_parent"android:layout_height="wrap_content"android:text="startActivityForResult方式返回，并且回傳數據" />
</LinearLayout>

　　效果圖如下：

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