动态更改应用桌面图标

基础部分：

activity-alias：可以用于创建多个不同的入口

android:enabled：默认为 true，创建多个入口时，先修改为 false。

android:icon：应用图标

android:label：应用名称

android:name：activity-alias 的别名

android:targetActivity：入口目标 Activity

android.intent.action.MAIN：决定最先启动的 Activity

android.intent.category.LAUNCHER：决定应用是否在显示在程序列表中

实际应用：

MainActivity

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

private Button btn_change11;
private Button btn_change22;

private ComponentName mChange11;
private ComponentName mChange22;
private ComponentName mDefault;
private PackageManager packageManager;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//初始化布局
initView();
//初始化ComponentName
initChange();
}

private void initChange() {
mDefault=getComponentName();
//注意new ComponentName 时填写 activity-alias 的别名时需要加上包名
mChange11=new ComponentName(getBaseContext(),"com.test.change_icon.change11");
mChange22=new ComponentName(getBaseContext(),"com.test.change_icon.change22");
packageManager=getApplicationContext().getPackageManager();
}

private void initView() {
btn_change11=findViewById(R.id.btn_change11);
btn_change22=findViewById(R.id.btn_change22);
btn_change11.setOnClickListener(this);
btn_change22.setOnClickListener(this);
}

@Override
public void onClick(View view) {
switch (view.getId()){
case R.id.btn_change11:
changeIcon11();
break;
case R.id.btn_change22:
changeIcon22();
break;
default:
break;
}
}

private void changeIcon22() {
disableComponent(mDefault);
disableComponent(mChange11);
enableComponent(mChange22);
}

private void changeIcon11() {
disableComponent(mDefault);
disableComponent(mChange22);
enableComponent(mChange11);
}

private void enableComponent(ComponentName componentName) {
packageManager.setComponentEnabledSetting(componentName,PackageManager.COMPONENT_ENABLED_STATE_ENABLED,PackageManager.DONT_KILL_APP);
}

private void disableComponent(ComponentName componentName) {
packageManager.setComponentEnabledSetting(componentName,PackageManager.COMPONENT_ENABLED_STATE_DISABLED,PackageManager.DONT_KILL_APP);
}
}

Manifesr.xml

<application
android:allowBackup="true"
android:icon="@drawable/s3"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme" >
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>

<activity-alias
android:name=".default"
android:enabled="false"
android:icon="@drawable/s1"
android:label="@string/app_name"
android:targetActivity=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity-alias>

<activity-alias
android:name=".change11"
android:enabled="false"
android:icon="@drawable/s1"
android:label="更换图标1"
android:targetActivity=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity-alias>

<activity-alias
android:name=".change22"
android:enabled="false"
android:icon="@drawable/s2"
android:label="更换图标2"
android:targetActivity=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity-alias>

</application>

参考文章 “ 徐宜生 Android群英传 “