android-无法通过MediaPlayer播放视频
这是我的代码：
MediaPlayer mMediaPlayer;
SurfaceView mSurfaceView;
SurfaceHolder holder;
MediaController mcontroller;
Handler handler;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.firstactivity);
SurfaceView v = (SurfaceView)findViewById(R.id.surfaceview);
v.getHolder().addCallback(this);
handler = new Handler();
mcontroller = new MediaController(this);
mcontroller.setVisibility(View.INVISIBLE);
mMediaPlayer = MediaPlayer.create(this, Uri.parse("http://192.168.1.20/uploads/myvid.mp4"));
// implement a fallback mechanism if it fails, for example if no internet or 404
if (mMediaPlayer == null) {
Log.v("this","Faileded to create MediaPlayer");
return;
}
mMediaPlayer.setOnBufferingUpdateListener(this);
mMediaPlayer.setOnCompletionListener(this);
mMediaPlayer.setOnPreparedListener(this);
mMediaPlayer.setScreenOnWhilePlaying(true);
mMediaPlayer.setOnVideoSizeChangedListener(this);
mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
}
@Override
public void surfaceCreated(SurfaceHolder arg0) {
if (mMediaPlayer == null) {
// implement a fallback mechanism if it fails, for example if no internet or 404
Log.v("this","MediaPlayer was not created");
return;
}
// the holder reference is already passed as arg0 here
mMediaPlayer.setDisplay(arg0);
try {
// progressDialog.dismiss();
Log.v("this","start");
mMediaPlayer.start();
} catch (IllegalStateException e) {
Log.v("this",e.getMessage());
e.printStackTrace();
}
}@Override
public void surfaceDestroyed(SurfaceHolder arg0) {
}
@Override
public void onVideoSizeChanged(MediaPlayer mp, int width, int height) {
// TODO Auto-generated method stub
}
@Override
public void onPrepared(MediaPlayer mp) {
// mcontroller.setMediaPlayer(this);
// mcontroller
// .setAnchorView(findViewById(R.id.screen_tutorial_video_surface));
// mcontroller.setEnabled(true);
//
// handler.post(new Runnable() {
// public void run() {
// mcontroller.show();
// }
// });
}
@Override
public void onCompletion(MediaPlayer mp) {
}
@Override
public void onBufferingUpdate(MediaPlayer mp, int percent) {
}
public void start() {
mMediaPlayer.start();
}
public void pause() {
mMediaPlayer.pause();
}
public int getDuration() {
return mMediaPlayer.getDuration();
}
public int getCurrentPosition() {
return mMediaPlayer.getCurrentPosition();
}
public void seekTo(int i) {
mMediaPlayer.seekTo(1);
}
public boolean isPlaying() {
return mMediaPlayer.isPlaying();
}
public int getBufferPercentage() {
return 0;
}
public boolean canPause() {
return true;
}
public boolean canSeekBackward() {
return true;
}
public boolean canSeekForward() {
return true;
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
// TODO Auto-generated method stub
}
电影网址是正确的。在log cat中它表示＆＃34;未创建MediaPlayer＆＃34;。此错误来自此surfaceCreated（），有一个条件表明如果mMediaPlayer为null，则显示此错误。
为什么它为空？
我在哪里做错了？
谢谢
1 个答案:
答案 0 :(得分：1)
使用以下
替换所有播放机代码玩家活动
import java.io.IOException;
import java.util.Timer;
import java.util.TimerTask;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnBufferingUpdateListener;
import android.media.MediaPlayer.OnCompletionListener;
import android.media.MediaPlayer.OnPreparedListener;
import android.media.MediaPlayer.OnSeekCompleteListener;
import android.os.Bundle;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceHolder.Callback;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.view.animation.Animation;
import android.view.animation.Animation.AnimationListener;
import android.view.animation.AnimationUtils;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ProgressBar;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.TextView;
import android.widget.Toast;
import com.android.utility.Utils;
import com.google.android.gms.analytics.HitBuilders;
import com.google.android.gms.analytics.Tracker;
import com.xav.wnPaid.WeatherNationApplicationController.TrackerName;
public class TempVODPlayer extends Activity implements
OnSeekBarChangeListener, Callback, OnPreparedListener,
OnCompletionListener, OnBufferingUpdateListener, OnClickListener,
OnSeekCompleteListener, AnimationListener {
private TextView textViewPlayed;
private TextView textViewLength;
private SeekBar seekBarProgress;
private SurfaceView surfaceViewFrame;
private ImageView imageViewPauseIndicator;
private MediaPlayer player;
private SurfaceHolder holder;
private ProgressBar progressBarWait;
private Timer updateTimer;
//private Bundle extras;
private Animation hideMediaController;
private LinearLayout linearLayoutMediaController;
private static final String TAG = "androidEx2 = VideoSample";
String defaulturl="";
WeatherNationApplicationController application;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.player_activity);
player = new MediaPlayer();
seekBarProgress = (SeekBar) findViewById(R.id.seekBarProgress);
defaulturl = "Your video url";
//extras = getIntent().getExtras();
FrameLayout videoFrame = (FrameLayout )findViewById(R.id.frameLayoutRoot);
linearLayoutMediaController = (LinearLayout) findViewById(R.id.linearLayoutMediaController);
linearLayoutMediaController.setVisibility(View.GONE);
hideMediaController = AnimationUtils.loadAnimation(this,
R.anim.disapearing);
hideMediaController.setAnimationListener(this);
imageViewPauseIndicator = (ImageView) findViewById(R.id.imageViewPauseIndicator);
imageViewPauseIndicator.setVisibility(View.GONE);
// if (player != null) {
// if (!player.isPlaying()) {
// imageViewPauseIndicator.setVisibility(View.VISIBLE);
// }
// }
textViewPlayed = (TextView) findViewById(R.id.textViewPlayed);
textViewLength = (TextView) findViewById(R.id.textViewLength);
surfaceViewFrame = (SurfaceView) findViewById(R.id.surfaceViewFrame);
surfaceViewFrame.setOnClickListener(this);
surfaceViewFrame.setClickable(false);
seekBarProgress.setOnSeekBarChangeListener(this);
seekBarProgress.setProgress(0);
progressBarWait = (ProgressBar) findViewById(R.id.progressBarWait);
holder = surfaceViewFrame.getHolder();
holder.addCallback(this);
holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
player.setOnPreparedListener(this);
player.setOnCompletionListener(this);
player.setOnBufferingUpdateListener(this);
player.setOnSeekCompleteListener(this);
player.setScreenOnWhilePlaying(true);
}
@Override
protected void onResume() {
// TODO Auto-generated method stub
WeatherNationApplicationController.activityResumed();
super.onResume();
}
@Override
protected void onPause() {
// TODO Auto-generated method stub
WeatherNationApplicationController.activityPaused();
super.onPause();
}
private void playVideo() {
if (defaulturl.equals("")) {
showToast("Please, set the video URI in HelloAndroidActivity.java in onClick(View v) method");
} else {
new Thread(new Runnable() {
@Override
public void run() {
try {
player.setDataSource(defaulturl);
player.prepare();
} catch (IllegalArgumentException e) {
showToast("Error while playing video");
Log.i(TAG,
"========== IllegalArgumentException ===========");
e.printStackTrace();
} catch (IllegalStateException e) {
showToast("Error while playing video");
Log.i(TAG,
"========== IllegalStateException ===========");
e.printStackTrace();
} catch (IOException e) {
showToast("Error while playing video. Please, check your network connection.");
Log.i(TAG, "========== IOException ===========");
e.printStackTrace();
}
catch (Exception e) {
// TODO: handle exception
Log.i(TAG, "========== eeeeeeee ===========");
e.printStackTrace();
}
}
}).start();
}
}
private void showToast(final String string) {
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(TempVODPlayer.this, string, Toast.LENGTH_LONG)
.show();
finish();
}
});
}
private void hideMediaController() {
new Thread(new Runnable() {
@Override
public void run() {
try {
Thread.sleep(5000);
runOnUiThread(new Runnable() {
@Override
public void run() {
linearLayoutMediaController
.startAnimation(hideMediaController);
}
});
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}).start();
}
@Override
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {
Log.i(TAG, "========== onProgressChanged : " + progress
+ " from user: " + fromUser);
if (!fromUser) {
textViewPlayed.setText(Utils.durationInSecondsToString(progress));
}
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
if (player.isPlaying()) {
progressBarWait.setVisibility(View.VISIBLE);
player.seekTo(seekBar.getProgress() * 1000);
Log.i(TAG, "========== SeekTo : " + seekBar.getProgress());
}
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
// TODO Auto-generated method stub
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
player.setDisplay(holder);
playVideo();
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
// TODO Auto-generated method stub
}
@Override
public void onPrepared(MediaPlayer mp) {
Log.i(TAG, "========== onPrepared ===========");
int duration = mp.getDuration() / 1000; // duration in seconds
seekBarProgress.setMax(duration);
textViewLength.setText(Utils.durationInSecondsToString(duration));
progressBarWait.setVisibility(View.GONE);
// Get the dimensions of the video
int videoWidth = player.getVideoWidth();
int videoHeight = player.getVideoHeight();
float videoProportion = (float) videoWidth / (float) videoHeight;
Log.i(TAG, "VIDEO SIZES: W: " + videoWidth + " H: " + videoHeight
+ " PROP: " + videoProportion);
// Get the width of the screen
int screenWidth = getWindowManager().getDefaultDisplay().getWidth();
int screenHeight = getWindowManager().getDefaultDisplay().getHeight();
float screenProportion = (float) screenWidth / (float) screenHeight;
Log.i(TAG, "VIDEO SIZES: W: " + screenWidth + " H: " + screenHeight
+ " PROP: " + screenProportion);
// Get the SurfaceView layout parameters
android.view.ViewGroup.LayoutParams lp = surfaceViewFrame
.getLayoutParams();
if (videoProportion > screenProportion) {
lp.width = screenWidth;
lp.height = (int) (screenWidth / videoProportion);
} else {
lp.width = (int) (videoProportion * screenHeight);
lp.height = screenHeight;
}
// Commit the layout parameters
surfaceViewFrame.setLayoutParams(lp);
// Start video
if (!player.isPlaying()) {
player.start();
updateMediaProgress();
linearLayoutMediaController.setVisibility(View.VISIBLE);
hideMediaController();
}
surfaceViewFrame.setClickable(true);
}
@Override
public void onCompletion(MediaPlayer mp) {
mp.stop();
if (updateTimer != null) {
updateTimer.cancel();
}
finish();
if(player !=null )
{
mp.release();
player.release();
player = null;
}
if (updateTimer != null) {
updateTimer.cancel();
}
finish();
}
/**
* Change progress of mediaController
* */
private void updateMediaProgress() {
updateTimer = new Timer("progress Updater");
updateTimer.scheduleAtFixedRate(new TimerTask() {
@Override
public void run() {
runOnUiThread(new Runnable() {
@Override
public void run() {
try {
seekBarProgress.setProgress(player.getCurrentPosition() / 1000);
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
}
});
}
}, 0, 1000);
}
@Override
public void onBufferingUpdate(MediaPlayer mp, int percent) {
int progress = (int) (mp.getDuration() * ((float) percent / (float) 100));
seekBarProgress.setSecondaryProgress(progress / 1000);
}
@Override
public void onClick(View v) {
if (v.getId() == R.id.surfaceViewFrame) {
if (linearLayoutMediaController.getVisibility() == View.GONE) {
linearLayoutMediaController.setVisibility(View.VISIBLE);
hideMediaController();
} else if (player != null) {
if (player.isPlaying()) {
player.pause();
imageViewPauseIndicator.setVisibility(View.VISIBLE);
} else {
player.start();
imageViewPauseIndicator.setVisibility(View.GONE);
}
}
}
}
@Override
public void onSeekComplete(MediaPlayer mp) {
progressBarWait.setVisibility(View.GONE);
}
@Override
public void onAnimationEnd(Animation animation) {
// TODO Auto-generated method stub
}
@Override
public void onAnimationRepeat(Animation animation) {
// TODO Auto-generated method stub
}
@Override
public void onAnimationStart(Animation animation) {
linearLayoutMediaController.setVisibility(View.GONE);
}
}
Plaeractivity layout
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<FrameLayout android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/frameLayoutRoot">
<SurfaceView android:id="@+id/surfaceViewFrame"
android:layout_gravity="center"
android:layout_height="wrap_content"
android:layout_width="wrap_content">
</SurfaceView>
<LinearLayout android:layout_width="match_parent"
android:id="@+id/linearLayoutMediaController"
android:layout_height="wrap_content"
android:paddingBottom="5dp"
android:paddingTop="5dp"
android:layout_gravity="bottom"
android:gravity="center_vertical"
android:background="@color/media_controller_bg_color">
<TextView android:layout_width="wrap_content"
android:id="@+id/textViewPlayed"
android:layout_marginLeft="5dp"
android:layout_marginRight="5dp"
android:textColor="@color/media_controller_text_color"
android:textStyle="bold" android:text="0:00:00"
android:padding="0dp" android:textSize="13sp"
android:gravity="center"
android:layout_height="wrap_content">
</TextView>
<SeekBar android:id="@+id/seekBarProgress"
android:layout_weight="1"
style="@style/MyCustomProgressStyle"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:progress="50"></SeekBar>
<TextView android:layout_width="wrap_content"
android:id="@+id/textViewLength"
android:layout_marginLeft="5dp"
android:layout_marginRight="5dp"
android:textColor="@color/media_controller_text_color"
android:textStyle="bold" android:text="0:00:00"
android:textSize="13sp" android:padding="0dp"
android:gravity="center"
android:layout_height="wrap_content"></TextView>
</LinearLayout>
<LinearLayout
android:id="@+id/ads"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center_horizontal"
android:orientation="vertical"
android:visibility="gone" >
</LinearLayout>
<ProgressBar style="?android:attr/progressBarStyleLarge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:id="@+id/progressBarWait"></ProgressBar>
<ImageView android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/imageViewPauseIndicator"
android:layout_gravity="center"
android:src="@drawable/pause_button"></ImageView>
</FrameLayout>
</LinearLayout>
可绘制的
中的SeekBarColors.xml选择器<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:id="@android:id/background">
<shape>
<solid android:color="@color/seekbar_bg" />
</shape>
</item>
<item android:id="@android:id/secondaryProgress">
<clip>
<shape>
<solid android:color="@color/seekbar_sec_progress" />
</shape>
</clip>
</item>
<item android:id="@android:id/progress">
<clip>
<shape>
<solid android:color="@color/seekbar_progress" />
</shape>
</clip>
</item>
</layer-list>
在color.xml中
<color name="media_controller_text_color">#FFFFFF</color>
<color name="media_controller_bg_color">#5f5f5f</color>
<color name="seekbar_bg">#141414</color>
<color name="seekbar_progress">#a53130</color>
<color name="seekbar_sec_progress">#875e5e</color>
可绘制的按钮
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