實現目標:
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實現原理:
為CheckBox添加一個監聽器事件;
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實現的源碼:
package?edu.cquptzx.showPassword;
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import?android.app.Activity;
import?android.os.Bundle;
import?android.text.method.HideReturnsTransformationMethod;
import?android.text.method.PasswordTransformationMethod;
import?android.widget.CheckBox;
import?android.widget.CompoundButton;
import?android.widget.EditText;
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publicclass?ShowPasswordActivity?extends?Activity {
????private?EditText?edittext;
????private?CheckBox?checkbox;?
????/** Called when the activity is first created. */
????publicvoid?onCreate(Bundle savedInstanceState) {
????????super.onCreate(savedInstanceState);
????????setContentView(R.layout.main);
????????/*find the object by IDs .*/
???????
????????edittext?= (EditText) findViewById(R.id.et);
????????checkbox?= (CheckBox) findViewById(R.id.cb);
???????
????????/* add a listener to the CheckBox */
????????checkbox.setOnCheckedChangeListener(new?CheckBox.OnCheckedChangeListener()
????????{
???????????publicvoid?onCheckedChanged(CompoundButton buttonView,boolean?isChecked)
???????????{
??????????????if(checkbox.isChecked())
??????????????{
??????????????????/* show the password*/
??????????????????edittext.setTransformationMethod(HideReturnsTransformationMethod.getInstance());
??????????????}
??????????????else
??????????????{
??????????????????/* hide the password */
?????????????????edittext.setTransformationMethod(PasswordTransformationMethod.getInstance());???
??????????????}?????????
???????????}??????
????????});
????}
}
相關知識:
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最后實現效果:
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