我想得到一个sting frome元数据标签,但我不能使用metadata.getString(),因为它返回null。所以,我使用metadata.getInt(),但我无法获得正确的值。我该怎么做?<meta-data android:name="GDT_BANNER_POST_ID" android:value="9079537218417626401"/>
答案 0 :(得分:1)
使用此:
ActivityInfo app = getPackageManager().getActivityInfo(this.getComponentName(), PackageManager.GET_ACTIVITIES|PackageManager.GET_META_DATA);
Bundle bundle = ai.metaData;
Object value = (Object)metaData.get(name);
答案 1 :(得分:0)
使用方法,例如:
private String retrieveKey(Context aContext, String aKey) {
// get the key from the manifest
final PackageManager pm = aContext.getPackageManager();
try {
final ApplicationInfo info = pm.getApplicationInfo(aContext.getPackageName(),
PackageManager.GET_META_DATA);
if (info.metaData == null) {
Log.i("Key not found in manifest", aKey);
} else {
final String value = String.valueOf(info.metaData.get(aKey));
if (value == null) {
Log.i("Key not found in manifest", aKey);
} else {
return value.trim();
}
}
} catch (final PackageManager.NameNotFoundException e) {
Log.i("Key not found in manifest", aKey);
}
return "";
}
在你的清单中,添加:
<meta-data
android:name="MY_KEY"
android:value="MY_VALUES" />
在您的代码中,只需检索它:
String myKey = retrieveKey(this, "MY_KEY");