android桌面添加快捷方式之判断是否存在无效

Android桌面程序提供了应用添加和删除桌面快捷方式的功能以及判断快捷方式是否存在，只要传入快捷方式标题、图标及点击快捷方式执行的应用Intent即可

在launcher.db中favortes这个表中会保存快捷方式的相关数据，但是判断快捷方式的方法不是总是很有效上网查了下发现大家的为问题都是2.2版本之后的就判断不正确了，在此将原来的判断方法贴一下

Java代码
private boolean hasShortCut() {
ContentResolver resolver = getContentResolver();
Cursor cursor = resolver.query(Uri.parse("content://com.android.launcher.settings/favorites?notify=true"), null, "title=?",
new String[] {getString(R.string.app_name)}, null);

if (cursor != null && cursor.moveToFirst()) {
cursor.close();
return true;
}

return false;
}

后来我看了一下2.2版本和1.5版本的launcher中的清单文件

1.5的如下：

Java代码

<receiver
android:name=".InstallShortcutReceiver"
android:permission="com.lp.launcher.permission.INSTALL_SHORTCUT">
<intent-filter>
<action android:name="com.lp.launcher.action.INSTALL_SHORTCUT" />
</intent-filter>
</receiver>


<receiver
android:name=".UninstallShortcutReceiver"
android:permission="com.lp.launcher.permission.UNINSTALL_SHORTCUT">
<intent-filter>
<action android:name="com.lp.launcher.action.UNINSTALL_SHORTCUT" />
</intent-filter>
</receiver>


<provider
android:name="LauncherProvider"
android:authorities="com.lp.launcher.settings"
android:writePermission="com.lp.launcher.permission.WRITE_SETTINGS"
android:readPermission="com.lp.launcher.permission.READ_SETTINGS" />

2.2的如下：
Java代码

<receiver
android:name="com.android.launcher2.InstallShortcutReceiver"
android:permission="com.android.launcher.permission.INSTALL_SHORTCUT">
<intent-filter>
<action android:name="com.android.launcher.action.INSTALL_SHORTCUT" />
</intent-filter>
</receiver>


<receiver
android:name="com.android.launcher2.UninstallShortcutReceiver"
android:permission="com.android.launcher.permission.UNINSTALL_SHORTCUT">
<intent-filter>
<action android:name="com.android.launcher.action.UNINSTALL_SHORTCUT" />
</intent-filter>
</receiver>


<provider
android:name="com.android.launcher2.LauncherProvider"
android:authorities="com.android.launcher2.settings"
android:writePermission="com.android.launcher.permission.WRITE_SETTINGS"
android:readPermission="com.android.launcher.permission.READ_SETTINGS" />

可以看出来创建和删除快捷方式的receiver没什么变化
但是查询的provider有了变化

Java代码
android:authorities="com.android.launcher.settings"

Java代码
android:authorities="com.android.launcher2.settings"

所以说我们的方法用在2.2之后的版本是无效的

现修改代码如下：

Java代码
public static boolean hasShortCut(Context context) {
String url = "";
System.out.println(getSystemVersion());
if(getSystemVersion() < 8){
url = "content://com.android.launcher.settings/favorites?notify=true";
}else{
url = "content://com.android.launcher2.settings/favorites?notify=true";
}
ContentResolver resolver = context.getContentResolver();
Cursor cursor = resolver.query(Uri.parse(url), null, "title=?",
new String[] {context.getString(R.string.app_name)}, null);

if (cursor != null && cursor.moveToFirst()) {
cursor.close();
return true;
}

return false;
}
private static int getSystemVersion(){
return android.os.Build.VERSION.SDK_INT;
}

OK，这样就可以兼容SDK版本了！

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