一,manifest修改,注意intent-filter标签内的内容,这一步重点是修改此标签
<activity
android:name=".MainActivity"
android:label="@string/app_name"
android:theme="@style/theme"
>
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
<category android:name="android.intent.category.HOME"/>
<category android:name="android.intent.category.DEFAULT"/>
</intent-filter>
</activity>
二,获取所有已安装的App,得到一个存有APP信息的集合apps
Intent intent = new Intent(Intent.ACTION_MAIN,null);
intent.addCategory(Intent.CATEGORY_LAUNCHER);
apps = getPackageManager().queryIntentActivities(intent, 0);
三,获取点击的app的信息(包名,类名),并打开点击的应用
private void startIntent(int position){
ResolveInfo info = apps.get(position);
String packageName = info.activityInfo.applicationInfo.packageName;
String className = info.activityInfo.applicationInfo.name;
Log.d(TAG, "packageName="+packageName+"--/--className="+className);
ComponentName component = new ComponentName(packageName,className);
Intent intent = new Intent();
intent.setComponent(component);
startActivity(intent);
}
四,附加,设置桌面背景
private void setWallPaper(){
Intent intent = new Intent(Intent.ACTION_SET_WALLPAPER);
Intent chooser = Intent.createChooser(intent, "choose_WallPaper");
startActivity(chooser);
}