實現目標:

?

實現原理:

為CheckBox添加一個監聽器事件;

?

實現的源碼:

package?edu.cquptzx.showPassword;

?

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;

?

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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?

?

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最后實現效果:

?

?

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轉載于:https://www.cnblogs.com/dongweiq/p/4721314.html

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