Issue
I'm sorry if it's not proper English because I'm using a translator.
I downloaded a program from github that can control the mouse over the Android phone. There is no problem connecting to the server, But an error occurs when touching the textview to control the mouse.
Uniquely, when running a program with a virtual device, no error occurs and works well.
I've seen many examples and answers, but I can't solve them, so I'm re-posting. ;_; I'd really appreciate it if you could tell me which parts to modify.
public class MainActivity extends ActionBarActivity implements View.OnClickListener {
Context context;
Button playPauseButton;
Button nextButton;
Button previousButton;
TextView mousePad;
private boolean isConnected=false;
private boolean mouseMoved=false;
private Socket socket;
private PrintWriter out;
private float initX =0;
private float initY =0;
private float disX =0;
private float disY =0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
context = this;
playPauseButton = (Button)findViewById(R.id.playPauseButton);
nextButton = (Button)findViewById(R.id.nextButton);
previousButton = (Button)findViewById(R.id.previousButton);
playPauseButton.setOnClickListener(this);
nextButton.setOnClickListener(this);
previousButton.setOnClickListener(this);
mousePad = (TextView)findViewById(R.id.mousePad);
mousePad.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
if(isConnected && out!=null){
switch(event.getAction()){
case MotionEvent.ACTION_DOWN:
initX =event.getX();
initY =event.getY();
mouseMoved=false;
break;
case MotionEvent.ACTION_MOVE:
disX = event.getX()- initX;
disY = event.getY()- initY;
initX = event.getX();
initY = event.getY();
if(disX !=0|| disY !=0){
out.println(disX +","+ disY);
}
mouseMoved=true;
break;
case MotionEvent.ACTION_UP:
if(!mouseMoved){
out.println(Constants.MOUSE_LEFT_CLICK);
}
}
}
return true;
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if(id == R.id.action_connect) {
ConnectPhoneTask connectPhoneTask = new ConnectPhoneTask();
connectPhoneTask.execute(Constants.SERVER_IP); //try to connect to server in another thread
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.playPauseButton:
if (isConnected && out!=null) {
out.println(Constants.PLAY);//send "play" to server
}
break;
case R.id.nextButton:
if (isConnected && out!=null) {
out.println(Constants.NEXT); //send "next" to server
}
break;
case R.id.previousButton:
if (isConnected && out!=null) {
out.println(Constants.PREVIOUS); //send "previous"
}
break;
}
}
@Override
public void onDestroy()
{
super.onDestroy();
if(isConnected && out!=null) {
try {
out.println("exit"); //tell server to exit
socket.close(); //close socket
} catch (IOException e) {
Log.e("remotedroid", "Error in closing socket", e);
}
}
}
public class ConnectPhoneTask extends AsyncTask<String,Void,Boolean> {
@Override
protected Boolean doInBackground(String... params) {
boolean result = true;
try {
InetAddress serverAddr = InetAddress.getByName(params[0]);
socket = new Socket(serverAddr, Constants.SERVER_PORT);//Open socket on server IP and port
} catch (IOException e) {
Log.e("remotedroid", "Error while connecting", e);
result = false;
}
return result;
}
@Override
protected void onPostExecute(Boolean result)
{
isConnected = result;
Toast.makeText(context,isConnected?"Connected to server!":"Error while connecting",Toast.LENGTH_LONG).show();
try {
if(isConnected) {
out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket
.getOutputStream())), true); //create output stream to send data to server
}
}catch (IOException e){
Log.e("remotedroid", "Error while creating OutWriter", e);
Toast.makeText(context,"Error while connecting",Toast.LENGTH_LONG).show();
}
}
}
}
layout xml :
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="@+id/playPauseButton"
android:clickable="true"
android:background="@android:color/holo_blue_dark"
android:id="@+id/mousePad"/>
<Button
android:id="@+id/playPauseButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:text="Button3" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Left"
android:id="@+id/previousButton"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Right"
android:id="@+id/nextButton"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true" />
error :
05-01 03:53:09.768 8768-8768/samcox.remotedroid E/InputEventReceiver: Exception dispatching input event.
05-01 03:53:09.775 8768-8768/samcox.remotedroid E/AndroidRuntime: FATAL EXCEPTION: main
Process: samcox.remotedroid, PID: 8768
android.os.NetworkOnMainThreadException
at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1513)
at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:116)
at java.net.SocketOutputStream.write(SocketOutputStream.java:161)
at sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:221)
at sun.nio.cs.StreamEncoder.implFlushBuffer(StreamEncoder.java:291)
at sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:295)
at sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:141)
at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:229)
at java.io.BufferedWriter.flush(BufferedWriter.java:254)
at java.io.PrintWriter.newLine(PrintWriter.java:482)
at java.io.PrintWriter.println(PrintWriter.java:629)
at java.io.PrintWriter.println(PrintWriter.java:740)
at samcox.remotedroid.MainActivity$1.onTouch(MainActivity.java:77)
at android.view.View.dispatchTouchEvent(View.java:13468)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3222)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2904)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3222)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2904)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3222)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2904)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3222)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2904)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3222)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2904)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3222)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2904)
at com.android.internal.policy.DecorView.superDispatchTouchEvent(DecorView.java:731)
at com.android.internal.policy.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1869)
at android.app.Activity.dispatchTouchEvent(Activity.java:3487)
at android.support.v7.internal.view.WindowCallbackWrapper.dispatchTouchEvent(WindowCallbackWrapper.java:59)
at com.android.internal.policy.DecorView.dispatchTouchEvent(DecorView.java:689)
at android.view.View.dispatchPointerEvent(View.java:13720)
at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:6125)
at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:5903)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:5352)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:5405)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:5371)
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:5530)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:5379)
at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:5587)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:5352)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:5405)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:5371)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:5379)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:5352)
at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:8412)
at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:8345)
at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:8298)
at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:8527)
at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:198)
at android.view.InputEventReceiver.nativeConsumeBatchedInputEvents(Native Method)
at android.view.InputEventReceiver.consumeBatchedInputEvents(InputEventReceiver.java:187)
at android.view.ViewRootImpl.doConsumeBatchedInput(ViewRootImpl.java:8486)
05-01 03:53:09.776 8768-8768/samcox.remotedroid E/AndroidRuntime: at android.view.ViewRootImpl$ConsumeBatchedInputRunnable.run(ViewRootImpl.java:8554)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:949)
at android.view.Choreographer.doCallbacks(Choreographer.java:761)
at android.view.Choreographer.doFrame(Choreographer.java:690)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:935)
at android.os.Handler.handleCallback(Handler.java:873)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7073)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:964)
I am a beginner in programming, so please excuse my errors
Solution
The issue is that inside the AsyncTask's onPostExecute you call the following:
socket.getOutputStream()
This happens on the MainThread and therefore the exception is thrown. Move it to the doInBackground inside the try catch block so it looks like this:
public class ConnectPhoneTask extends AsyncTask<String,Void,Boolean> {
@Override
protected Boolean doInBackground(String... params) {
boolean result = true;
try {
InetAddress serverAddr = InetAddress.getByName(params[0]);
socket = new Socket(serverAddr, Constants.SERVER_PORT);//Open socket on server IP and port
if(isConnected) {
out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket
.getOutputStream())), true); //create output stream to send data to server
}
} catch (IOException e) {
Log.e("remotedroid", "Error while connecting", e);
result = false;
}
return result;
}
@Override
protected void onPostExecute(Boolean result)
{
isConnected = result;
Toast.makeText(context,isConnected?"Connected to server!":"Error while connecting",Toast.LENGTH_LONG).show();
}
}
Answered By - Rene Ferrari
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