1
我有BaseActivity.I實現了一些方法，我在子Activity中使用了這種重寫方法。 這是BaseActivity類setVisibility在android中爲null
public class BaseActivity extends FragmentActivity {
public static BaseActivity mThis;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.view_empty_menu);
mThis = this;
try {
IO.Options opts = new IO.Options();
opts.forceNew = true;
opts.reconnection = false;
socketConnectionShowDialog();
final io.socket.client.Socket socket = IO.socket("http://54e1755a.ngrok.io", opts);
socket.on(io.socket.client.Socket.EVENT_CONNECT, new Emitter.Listener() {
@Override
public void call(Object... args) {
JSONObject obj = new JSONObject();
try {
obj.put("host", "*********");
obj.put("entity", new DeviceManager(UApplication.getInstance()).getDeviceId());
socket.emit("initialize", obj);
} catch (JSONException e) {
e.printStackTrace();
}
}
}).on("onconnect", new Emitter.Listener() {
@Override
public void call(Object... args) {
JSONObject obj = (JSONObject) args[0];
Log.e("obj", obj.toString());
socketConnectionHideDialog();
}
}).on("onerror", new Emitter.Listener() {
@Override
public void call(Object... args) {
JSONObject obj = (JSONObject) args[0];
Log.e("obj", obj.toString());
socketConnectionOnError();
}
}).on("device", new Emitter.Listener() {
@Override
public void call(Object... args) {
JSONObject jsonObject = (JSONObject) args[0];
socketConnectionOnDevice(jsonObject);
}
}).on(io.socket.client.Socket.EVENT_DISCONNECT, new Emitter.Listener() {
@Override
public void call(Object... args) {
}
});
socket.connect();
} catch (URISyntaxException e) {
e.printStackTrace();
socketConnectionHideDialog();
}
}
@Override
protected void onSaveInstanceState(Bundle outState) {
outState.putString("WORKAROUND_FOR_BUG_19917_KEY", "WORKAROUND_FOR_BUG_19917_VALUE");
super.onSaveInstanceState(outState);
}
@Override
protected void onStart() {
super.onStart();
}
@Override
protected void onStop() {
super.onStop();
}
protected View getRootView() {
return this.getWindow().getDecorView().findViewById(android.R.id.content);
}
protected void socketConnectionShowDialog() {
}
protected void socketConnectionHideDialog() {
}
protected void socketConnectionOnDevice(JSONObject jsonObject) {
}
protected void socketConnectionOnError() {
}
}
，這是
public class MainActivity extends BaseActivity {
private ImageView videoStatus;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
videoStatus = (ImageView) findViewById(R.id.video_status);
}
@Override
public void onBackPressed() {
super.onBackPressed();
Intent intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_HOME);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
}
@Override
protected void socketConnectionHideDialog() {
super.socketConnectionHideDialog();
Log.e("socketConnectionHideDialog", "socketConnectionHideDialog");
}
@Override
protected void socketConnectionOnDevice(JSONObject jsonObject) {
super.socketConnectionOnDevice(jsonObject);
Log.e("socketConnectionOnDevice", "socketConnectionOnDevice");
}
@Override
protected void socketConnectionOnError() {
super.socketConnectionOnError();
Log.e("socketConnectionOnError", "socketConnectionOnError");
}
@Override
protected void socketConnectionShowDialog() {
super.socketConnectionShowDialog();
Log.e("socketConnectionShowDialog", "socketConnectionShowDialog");
initUniMedia();
}
private void initUniMedia() {
videoStatus.setVisibility(View.VISIBLE);
}
}
activity_main.xml code
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#000000">
<ImageView
android:id="@+id/video_status"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:layout_gravity="center"
android:src="@mipmap/pause_icon"
android:textColor="#ffffff"
android:textSize="24dp" />
</RelativeLayout>
我的覆蓋功能的工作完美的孩子活動的Java類，只有我在視圖的setVisibility.in activity_main.xml中Ø當然問題包含這一觀點 我如何解決我的問題？
問題不清楚。請妥善解釋。也添加xml文件。 –
在我的BaseActivity中，我有socket.io連接方法，我想使用這個BaseActivity類的另一個活動，正如我所說的，連接和方法工作完美，但我只有setVisibility問題@J – BekaKK