Android，实现一个弹幕效果的小demo
2017-09-26 11:47
711 查看
代码不是很多，花了十多分钟写的。。。
BarrageLauncher（弹幕发射器）
NativeVideoPlayer（视频播放器）
package com.zzyd.example;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Color;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.Gravity;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.LinearInterpolator;
import android.view.animation.TranslateAnimation;
import android.widget.Button;
import android.widget.EditText;
import android.widget.FrameLayout;
import android.widget.TextView;
import java.util.Random;
/**
* Created by Administrator on 2017/9/26 0026.
* 弹幕发射器
*/
public class BarrageLauncher extends FrameLayout implements View.OnClickListener {
private Context context;
private NativeVideoPlayer nativeVideoPlayer;
private View barrageView;
private EditText editText;
private Button sendBtn;
private TranslateAnimation animation;
private int viewWidth;
private int viewHeight;
public BarrageLauncher(@NonNull Context context) {
super(context);
this.context = context;
init();
}
public BarrageLauncher(@NonNull Context context, @Nullable AttributeSet attrs) {
super(context, attrs);
this.context = context;
init();
}
private void init() {
nativeVideoPlayer = new NativeVideoPlayer(context);
barrageView = View.inflate(context, R.layout.view_barrage, null);
editText = barrageView.findViewById(R.id.barrageEd);
sendBtn = barrageView.findViewById(R.id.sendBtn);
sendBtn.setOnClickListener(this);
addView(nativeVideoPlayer);
addView(barrageView);
Resources resources = getResources();
DisplayMetrics dm = resources.getDisplayMetrics();
}
public void loadBarrage(final String[] barrages){
new Thread(new Runnable() {
@Override
public void run() {
for(String s : barrages){
Message msg = Message.obtain();
msg.what = 0;
Bundle b = new Bundle();
b.putString("key",s);
msg.setData(b);
handler.sendMessage(msg);
try {
Thread.sleep(80);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}).start();
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
viewWidth = MeasureSpec.getSize(widthMeasureSpec);
viewHeight = MeasureSpec.getSize(heightMeasureSpec);
animation = new TranslateAnimation(viewWidth,0,50,50);
animation.setDuration(8500);
animation.setInterpolator(new LinearInterpolator());
}
public void addItemView(final View child){
super.addView(child);
FrameLayout.LayoutParams layoutParams = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
// layoutParams.gravity = Gravity.RIGHT;
layoutParams.topMargin = getRandom(10,viewHeight/2);
child.setLayoutParams(layoutParams);
child.startAnimation(animation);
animation.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
removeView(child);
}
@Override
public void onAnimationRepeat(Animation animation) {
}
});
}
private TextView createItemView(String msg){
TextView textView = new TextView(context);
textView.setText(msg);
textView.setTextColor(Color.YELLOW);
textView.setTextSize(getRandom(15,25));
return textView;
}
@Override
public void onClick(View view) {
addItemView(createItemView(editText.getText().toString()));
editText.setText("");
}
private static int getRandom(int min , int max){
Random random = new Random();
return random.nextInt(max)%(max - min + 1) + min;
}
private Handler handler = new Handler(){
@Override
public void dispatchMessage(Message msg) {
super.dispatchMessage(msg);
addItemView(createItemView(msg.getData().getString("key")));
}
};
}package com.zzyd.example;
import android.content.Context;
import android.content.res.AssetFileDescriptor;
import android.content.res.AssetManager;
import android.media.MediaPlayer;
import android.util.AttributeSet;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import java.io.IOException;
/**
* Created by Administrator on 2017/9/26 0026.
*/
public class NativeVideoPlayer extends SurfaceView {
private SurfaceHolder surfaceHolder;
private MediaPlayer mediaPlayer;
private Context context;
public NativeVideoPlayer(Context context) {
super(context);
this.context = context;
init();
}
public NativeVideoPlayer(Context context, AttributeSet attrs) {
super(context, attrs);
this.context = context;
init();
}
private void init(){
surfaceHolder = getHolder();
surfaceHolder.addCallback(callback2);
mediaPlayer = new MediaPlayer();
}
private SurfaceHolder.Callback2 callback2 = new SurfaceHolder.Callback2() {
@Override
public void surfaceRedrawNeeded(SurfaceHolder surfaceHolder) {
}
@Override
public void surfaceCreated(SurfaceHolder surfaceHolder) {
mediaPlayer.setSurface(surfaceHolder.getSurface());
try {
AssetManager assetMg = context.getAssets();
AssetFileDescriptor fileDescriptor = assetMg.openFd("test.mp4");
mediaPlayer.setDataSource(fileDescriptor.getFileDescriptor(),
fileDescriptor.getStartOffset(), fileDescriptor.getLength());
mediaPlayer.setLooping(true);
mediaPlayer.setVolume(0, 0);
mediaPlayer.prepare();
mediaPlayer.start();
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
public void surfaceChanged(SurfaceHolder surfaceHolder, int i, int i1, int i2) {
}
@Override
public void surfaceDestroyed(SurfaceHolder surfaceHolder) {
mediaPlayer.stop();
mediaPlayer.release();
}
};
}package com.zzyd.example;
import android.content.pm.ActivityInfo;
import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
private String[] barrages = new String[]{
"onCreate","AppCompatActivity",
"MainActivity",
"String[]",
"barrages","String",
"mipmap-hdpi",
"activity_main.xml",
"barrageLauncher",
"ic_launcher_round.png",
"AndroidManifest.xml",
"mipmap-xxhdpi",
"BarrageLauncher",
"SCREEN_ORIENTATION_LANDSCAPE",
"barrageLauncher",
"BarrageLauncher",
"ActivityInfo",
"setRequestedOrientation",
"onCreate",
"savedInstanceState",
"onCreate","AppCompatActivity",
"MainActivity",
"String[]",
"barrages","String",
"mipmap-hdpi",
"activity_main.xml",
"barrageLauncher",
"ic_launcher_round.png",
"AndroidManifest.xml",
"mipmap-xxhdpi",
"BarrageLauncher",
"SCREEN_ORIENTATION_LANDSCAPE",
"barrageLauncher",
"BarrageLauncher",
"ActivityInfo",
"setRequestedOrientation",
"onCreate",
"savedInstanceState",
"onCreate","AppCompatActivity",
"MainActivity",
"String[]",
"barrages","String",
"mipmap-hdpi",
"activity_main.xml",
"barrageLauncher",
"ic_launcher_round.png",
"AndroidManifest.xml",
"mipmap-xxhdpi",
"BarrageLauncher",
"SCREEN_ORIENTATION_LANDSCAPE",
"barrageLauncher",
"BarrageLauncher",
"ActivityInfo",
"setRequestedOrientation",
"onCreate",
"savedInstanceState",
"onCreate","AppCompatActivity",
"MainActivity",
"String[]",
"barrages","String",
"mipmap-hdpi",
"activity_main.xml",
"barrageLauncher",
"ic_launcher_round.png",
"AndroidManifest.xml",
"mipmap-xxhdpi",
"BarrageLauncher",
"SCREEN_ORIENTATION_LANDSCAPE",
"barrageLauncher",
"BarrageLauncher",
"ActivityInfo",
"setRequestedOrientation",
"onCreate",
"savedInstanceState",
"onCreate","AppCompatActivity",
"MainActivity",
"String[]",
"barrages","String",
"mipmap-hdpi",
"activity_main.xml",
"barrageLauncher",
"ic_launcher_round.png",
"AndroidManifest.xml",
"mipmap-xxhdpi",
"BarrageLauncher",
"SCREEN_ORIENTATION_LANDSCAPE",
"barrageLauncher",
"BarrageLauncher",
"ActivityInfo",
"setRequestedOrientation",
"onCreate",
"savedInstanceState",
"onCreate","AppCompatActivity",
"MainActivity",
"String[]",
"barrages","String",
"mipmap-hdpi",
"activity_main.xml",
"barrageLauncher",
"ic_launcher_round.png",
"AndroidManifest.xml",
"mipmap-xxhdpi",
"BarrageLauncher",
"SCREEN_ORIENTATION_LANDSCAPE",
"barrageLauncher",
"BarrageLauncher",
"ActivityInfo",
"setRequestedOrientation",
"onCreate",
"savedInstanceState",
"onCreate","AppCompatActivity",
"MainActivity",
"String[]",
"barrages","String",
"mipmap-hdpi",
"activity_main.xml",
"barrageLauncher",
"ic_launcher_round.png",
"AndroidManifest.xml",
"mipmap-xxhdpi",
"BarrageLauncher",
"SCREEN_ORIENTATION_LANDSCAPE",
"barrageLauncher",
"BarrageLauncher",
"ActivityInfo",
"setRequestedOrientation",
"onCreate",
"savedInstanceState",
"onCreate","AppCompatActivity",
"MainActivity",
"String[]",
"barrages","String",
"mipmap-hdpi",
"activity_main.xml",
"barrageLauncher",
"ic_launcher_round.png",
"AndroidManifest.xml",
"mipmap-xxhdpi",
"BarrageLauncher",
"SCREEN_ORIENTATION_LANDSCAPE",
"barrageLauncher",
"BarrageLauncher",
"ActivityInfo",
"setRequestedOrientation",
"onCreate",
"savedInstanceState",
"onCreate","AppCompatActivity",
"MainActivity",
"String[]",
"barrages","String",
"mipmap-hdpi",
"activity_main.xml",
"barrageLauncher",
"ic_launcher_round.png",
"AndroidManifest.xml",
"mipmap-xxhdpi",
"BarrageLauncher",
"SCREEN_ORIENTATION_LANDSCAPE",
"barrageLauncher",
"BarrageLauncher",
"ActivityInfo",
"setRequestedOrientation",
"onCreate",
"savedInstanceState",
"onCreate","AppCompatActivity",
"MainActivity",
"String[]",
"barrages","String",
"mipmap-hdpi",
"activity_main.xml",
"barrageLauncher",
"ic_launcher_round.png",
"AndroidManifest.xml",
"mipmap-xxhdpi",
"BarrageLauncher",
"SCREEN_ORIENTATION_LANDSCAPE",
"barrageLauncher",
"BarrageLauncher",
"ActivityInfo",
"setRequestedOrientation",
"onCreate",
"savedInstanceState",
"onCreate","AppCompatActivity",
"MainActivity",
"String[]",
"barrages","String",
"mipmap-hdpi",
"activity_main.xml",
"barrageLauncher",
"ic_launcher_round.png",
"AndroidManifest.xml",
"mipmap-xxhdpi",
"BarrageLauncher",
"SCREEN_ORIENTATION_LANDSCAPE",
"barrageLauncher",
"BarrageLauncher",
"ActivityInfo",
"setRequestedOrientation",
"onCreate",
"savedInstanceState",
"onCreate","AppCompatActivity",
"MainActivity",
"String[]",
"barrages","String",
"mipmap-hdpi",
"activity_main.xml",
"barrageLauncher",
"ic_launcher_round.png",
"AndroidManifest.xml",
"mipmap-xxhdpi",
"BarrageLauncher",
"SCREEN_ORIENTATION_LANDSCAPE",
"barrageLauncher",
"BarrageLauncher",
"ActivityInfo",
"setRequestedOrientation",
"onCreate",
"savedInstanceState",
"onCreate","AppCompatActivity",
"MainActivity",
"String[]",
"barrages","String",
"mipmap-hdpi",
"activity_main.xml",
"barrageLauncher",
"ic_launcher_round.png",
"AndroidManifest.xml",
"mipmap-xxhdpi",
"BarrageLauncher",
"SCREEN_ORIENTATION_LANDSCAPE",
"barrageLauncher",
"BarrageLauncher",
"ActivityInfo",
"setRequestedOrientation",
"onCreate",
"savedInstanceState",
};
BarrageLauncher barrageLauncher;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
barrageLauncher = new BarrageLauncher(this);
setContentView(barrageLauncher);
barrageLauncher.postDelayed(new Runnable() {
@Override
public void run() {
Message message = Message.obtain();
message.what = 0;
handler.sendMessage(message);
}
},1000);
}
private Handler handler = new Handler(){
@Override
public void dispatchMessage(Message msg) {
super.dispatchMessage(msg);
Toast.makeText(MainActivity.this,"发射",Toast.LENGTH_SHORT).show();
barrageLauncher.loadBarrage(barrages);
}
};
}
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