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This article mainly shows you "how to use SurfaceView to achieve video barrage", the content is easy to understand, clear, hope to help you solve your doubts, the following let the editor lead you to study and learn "how to use SurfaceView to achieve video barrage" this article.

The full code is as follows:

Package com.example.app2;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.PixelFormat;import android.graphics.PorterDuff;import android.media.MediaPlayer;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.text.TextUtils;import android.view.SurfaceHolder;import android.view.SurfaceView;import android.view.View;import android.widget.EditText;import android.widget.Toast;import java.io.IOException;import java.util.ArrayList;import java.util.List Public class MainActivity extends AppCompatActivity implements SurfaceHolder.Callback {private SurfaceView mSvVideo; private SurfaceView mSvDanMu; private EditText mEd; private MediaPlayer mediaPlayer; private SurfaceHolder svVideoHolder, svDanMuHolder; private boolean isPlay = true; List list = new ArrayList (); @ Override protected void onCreate (Bundle savedInstanceState) {super.onCreate (savedInstanceState); setContentView (R.layout.activity_main); / / create MediaPlayer initPlayer (); / / initialize the view initView () } private void initPlayer () {if (mediaPlayer = = null) {mediaPlayer = new MediaPlayer ();} / / reset mediaPlayer.reset (); try {mediaPlayer.setDataSource ("http://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4"); mediaPlayer.prepareAsync ()) / / prepare mediaPlayer.setOnPreparedListener asynchronously (new MediaPlayer.OnPreparedListener () {@ Override public void onPrepared (MediaPlayer mp) {mediaPlayer.setLooping (true); / / whether to enable loop playback mediaPlayer.start (); / / start playback}});} catch (IOException e) {e.printStackTrace () }} / * message sent * * @ param view * / public void send (View view) {submit ();} private void submit () {/ / validate non-null judgment String edString = mEd.getText (). ToString (). Trim (); if (TextUtils.isEmpty (edString)) {Toast.makeText (this, "edString cannot be empty", Toast.LENGTH_SHORT). Show (); return } list.add (new DanMuBean (edString)); / / add data mEd.setText (""); / / clear} private void initView () {mSvVideo = (SurfaceView) findViewById (R.id.sv_video); mSvDanMu = (SurfaceView) findViewById (R.id.sv_danMu); mEd = (EditText) findViewById (R.id.ed); / / initialize svDanMuHolder svVideoHolder svVideoHolder = mSvVideo.getHolder (); svDanMuHolder = mSvDanMu.getHolder () / / add listening svVideoHolder.addCallback (this); svDanMuHolder.addCallback (this); / / display the barrage on the top layer and set it to transparent mSvDanMu.setZOrderOnTop (true); svDanMuHolder.setFormat (PixelFormat.TRANSPARENT); / / PixelFormat: pixel format, TRANSPARENT (2): transparent TRANSLUCENT (- 3): translucent} / * surfaceCreated: create * * @ param holder * / @ Override public void surfaceCreated (SurfaceHolder holder) {if (holder = = svVideoHolder) {mediaPlayer.setDisplay (svVideoHolder) / / display the content on svVideoHolder} else if (holder = = svDanMuHolder) {/ / on-screen comment setting open thread new Thread (new Runnable () {@ Override public void run () {while (isPlay) {/ / endless loop / / get the brush, set the property Paint paint = new Paint (); paint.setStrokeWidth (5) / / set stroke width paint.setTextSize (30); / / set font size paint.setColor (Color.GREEN); / / set color / / get canvas via lockCanvas Canvas canvas = svDanMuHolder.lockCanvas (); if (canvas = = null) {break } / / Color of filling canvas canvas.drawColor (PixelFormat.TRANSPARENT, PorterDuff.Mode.CLEAR); / / Parameter 1: set to transparent, Ref 2: PorterDuff.Mode.CLEAR: painted will not be submitted to canvas / / set on-screen comment content for (int I = 0; I

MSvVideo.getWidth () {list.get (I) .x = 0;}} / / submit svDanMuHolder.unlockCanvasAndPost (canvas);}) .start () } @ Override public void surfaceChanged (SurfaceHolder holder, int format, int width, int height) {} @ Override public void surfaceDestroyed (SurfaceHolder holder) {isPlay = false;}}

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The above is all the content of the article "how to use SurfaceView to achieve video on-screen comment". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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