Thursday, March 8, 2012

MediaPlay on SurfaceView: correct aspect ratio

Last exercise "Play media in Fragment, run on Android 3.0 Tablet", the layout width and height is in-correct. It will be aligned in this exercise to correct the aspect ration.

Play landscape video
Play portrait video

First, modify playerlayout.xml to change both layout_width and layout_height of the SurfaceView to "fill_parent". And also layout_gravity="center".
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >

<TextView
android:id="@+id/mediauri"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
<Button
android:id="@+id/playvideoplayer"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="- PLAY Video -"/>
<Button
android:id="@+id/pausevideoplayer"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="- PAUSE Video -"/>
<SurfaceView
android:id="@+id/surfaceview"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_gravity="center" />

</LinearLayout>


Modify PlayerFragmen.java to add the code marked "Handle aspect ratio".
package com.exercise.AndroidListMedia;

import java.io.IOException;

import android.app.Fragment;
import android.graphics.PixelFormat;
import android.media.MediaPlayer;
import android.net.Uri;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
import android.media.AudioManager;

public class PlayerFragment extends Fragment
implements SurfaceHolder.Callback {

Uri targetUri = null;

MediaPlayer mediaPlayer;
SurfaceView surfaceView;
SurfaceHolder surfaceHolder;
boolean pausing = false;

TextView mediaUri;
Button buttonPlayVideo, buttonPauseVideo;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
View view = inflater.inflate(R.layout.playerlayout, container, false);
mediaUri = (TextView)view.findViewById(R.id.mediauri);
buttonPlayVideo = (Button)view.findViewById(R.id.playvideoplayer);
buttonPauseVideo = (Button)view.findViewById(R.id.pausevideoplayer);
surfaceView = (SurfaceView)view.findViewById(R.id.surfaceview);

getActivity().getWindow().setFormat(PixelFormat.UNKNOWN);
surfaceHolder = surfaceView.getHolder();
surfaceHolder.addCallback(this);
surfaceHolder.setFixedSize(176, 144);
surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
mediaPlayer = new MediaPlayer();


buttonPlayVideo.setOnClickListener(new Button.OnClickListener(){

@Override
public void onClick(View arg0) {

if(targetUri != null){

pausing = false;

if(mediaPlayer.isPlaying()){
mediaPlayer.reset();
}

mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
mediaPlayer.setDisplay(surfaceHolder);

try {
mediaPlayer.setDataSource(getActivity().getApplicationContext(), targetUri);
mediaPlayer.prepare();
} catch (IllegalArgumentException e) {
e.printStackTrace();
Toast.makeText(getActivity(), e.toString(), Toast.LENGTH_LONG).show();
} catch (IllegalStateException e) {
e.printStackTrace();
Toast.makeText(getActivity(), e.toString(), Toast.LENGTH_LONG).show();
} catch (IOException e) {
e.printStackTrace();
Toast.makeText(getActivity(), e.toString(), Toast.LENGTH_LONG).show();
}

/*
* Handle aspect ratio
*/
int surfaceView_Width = surfaceView.getWidth();
int surfaceView_Height = surfaceView.getHeight();

float video_Width = mediaPlayer.getVideoWidth();
float video_Height = mediaPlayer.getVideoHeight();

float ratio_width = surfaceView_Width/video_Width;
float ratio_height = surfaceView_Height/video_Height;
float aspectratio = video_Width/video_Height;

LayoutParams layoutParams = surfaceView.getLayoutParams();

if (ratio_width > ratio_height){
layoutParams.width = (int) (surfaceView_Height * aspectratio);
layoutParams.height = surfaceView_Height;
}else{
layoutParams.width = surfaceView_Width;
layoutParams.height = (int) (surfaceView_Width / aspectratio);
}

surfaceView.setLayoutParams(layoutParams);
/*
*
*/

mediaPlayer.start();
}

}});

buttonPauseVideo.setOnClickListener(new Button.OnClickListener(){

@Override
public void onClick(View arg0) {
if(targetUri != null){
if(pausing){
pausing = false;
mediaPlayer.start();
}
else{
pausing = true;
mediaPlayer.pause();
}
}
}});

return view;
}

@Override
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
}

@Override
public void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
mediaPlayer.release();
}

@Override
public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {
// TODO Auto-generated method stub

}

@Override
public void surfaceCreated(SurfaceHolder arg0) {
// TODO Auto-generated method stub

}

@Override
public void surfaceDestroyed(SurfaceHolder arg0) {
// TODO Auto-generated method stub

}

public void setTargetUri(Uri u){
targetUri = u;
mediaUri.setText(u.toString());
}

}



Download the files.


Next:
- Get Thumbnail of video

1 comment:

Anonymous said...

As in my project, It seems that the scaling of the video doesn't work. It is croped to the size of the surface view. Can you reproduce this behaviour? Are there any hints to fix this?

Thanks, Christian