AndroidMainfest.xml中的meta-data属性

这个属性平时比较少用,稍微记录一下:

1)AndroidMainfest.xml中声明如下

        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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


            <meta-data
                android:name="sun"
                android:value="sunwinner"
                >
            </meta-data>

        </activity>

2)Java代码可以通过这种方式获取值:

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        init();
        try{
            ActivityInfo activityInfo = MainActivity.this.getPackageManager().getActivityInfo(getComponentName(), PackageManager.GET_META_DATA);
            String data = activityInfo.metaData.getString("sun");
            Log.d("sun","Test Value is ="+data);
        }catch (Exception e){
        }
    }

3)输出:

03-29 17:41:23.741 27172 27172 D sun     : Test Value is =sunwinner