dialog —— 不再显示

最新推荐文章于 2023-02-22 14:45:59 发布

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本文介绍如何在Android应用中实现对话框的记忆功能，即用户选择不再显示某对话框后，该对话框将不再出现。通过SharedPreferences保存用户的选择状态，并在启动应用时检查此状态。

要显示一个dialog，要实现点击dialog上“不再提示”按钮之后，下次启动程序就不会出现此对话框，怎么实现呢：

1下面是一个例子：

主Activity：

package hao.test.mima;

import android.app.Activity;

import android.app.AlertDialog;

import android.app.Dialog;

import android.content.DialogInterface;

import android.os.Bundle;

import android.view.KeyEvent;

import hao.test.uitil.YyBackUpPreferences;

public class mima extends Activity {

private Preferences pref = null;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

pref = Preferences.getInstance(this);

//一定要做判断

if (pref.isShowPwdTip()) {

showDialog(0);

}

@Override

protected Dialog onCreateDialog(int id) {

switch (id) {

case 0: {

return new AlertDialog.Builder(mima.this)

.setOnKeyListener(new DialogInterface.OnKeyListener() {

@Override

public boolean onKey(DialogInterface dialog, int keyCode, KeyEvent event) {

// TODO Auto-generated method stub

if (event.getKeyCode() == KeyEvent.KEYCODE_SEARCH) {

return true;

}

return false;

}

})

.setTitle("实验：")

.setMessage("这是一个测试")

.setPositiveButton("确定",

new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

removeDialog(0);

}

})

.setNegativeButton("不再显示",

new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

removeDialog(0);

//在这里记录状态

pref.closeShowPwdTip();

}

})

.setNeutralButton("设置", new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

removeDialog(0);

// startSettingActivity();

}

}).create();

}

default: {

return null;

}

参数class:

package hao.test.uitil;

import android.content.Context;

import android.content.SharedPreferences;

import android.content.SharedPreferences.Editor;

import android.preference.PreferenceManager;

public class Preferences {

private static final String KEY_IS_SHOW_PWD_TIP = "KISPT";

private static SharedPreferences sharedPreferences;

private static Context context;

private static Preferences instance;

public static Preferences getInstance(Context c) {

context=c;

if (instance == null) {

instance = new Preferences();

}

return instance;

}

public boolean closeShowPwdTip() {

Editor editor = getEditor();

editor.putBoolean(KEY_IS_SHOW_PWD_TIP, false);

return editor.commit();

}

private Editor getEditor() {

SharedPreferences pref = getSharedPreferences();

return pref.edit();

}

private SharedPreferences getSharedPreferences() {

if (sharedPreferences == null)

sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context);

return sharedPreferences;

}

//判断是否点击了那个“不再显示按钮”，如果按了的话，返回false。

public boolean isShowPwdTip() {

return getSharedPreferences().getBoolean(KEY_IS_SHOW_PWD_TIP, true);

}

2下面是在一个文件中的：

package hao.test.mima;

import android.app.Activity;

import android.app.AlertDialog;

import android.app.Dialog;

import android.content.DialogInterface;

import android.content.SharedPreferences;

import android.content.SharedPreferences.Editor;

import android.os.Bundle;

import android.preference.PreferenceManager;

import android.view.KeyEvent;

public class mima extends Activity {

private static final String KEY_IS_SHOW_PWD_TIP = "KISPT";

private static SharedPreferences sharedPreferences;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

// 一定要做判断

if (isShowPwdTip()) {

showDialog(0);

}

@Override

protected Dialog onCreateDialog(int id) {

switch (id) {

case 0: {

return new AlertDialog.Builder(mima.this)

.setOnKeyListener(new DialogInterface.OnKeyListener() {

@Override

public boolean onKey(DialogInterface dialog, int keyCode, KeyEvent event) {

if (event.getKeyCode() == KeyEvent.KEYCODE_SEARCH) {

return true;

}

return false;

}

}).setTitle("实验：").setMessage("这是一个测试")

.setPositiveButton("确定", new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

removeDialog(0);

}

}).setNegativeButton("不再显示", new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

removeDialog(0);

// 在这里记录状态

closeShowPwdTip();

}

}).setNeutralButton("设置", new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

removeDialog(0);

// startSettingActivity();

}

}).create();

}

default: {

return null;

}

public boolean closeShowPwdTip() {

if (sharedPreferences == null)

sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);

Editor editor = sharedPreferences.edit();

editor.putBoolean(KEY_IS_SHOW_PWD_TIP, false);

return editor.commit();

}

public boolean isShowPwdTip() {

if (sharedPreferences == null)

sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);

return sharedPreferences.getBoolean(KEY_IS_SHOW_PWD_TIP, true);

}