Android视频的放大和缩小
来源：互联网 发布：三国志11古武将数据 编辑：程序博客网 时间：2024/05/17 16:02
Android视频的放大和缩小
这个还是在很久以前的时候写的，当时公司有一个需求，就是需要仿360或者是小蚁的app，做一个视频的放大缩小，当时是搜遍了，搜到的都是关于图片的放大缩小等，无奈之下，就自己去研究了一下，布局啊，自定义控件啊，手势啊，话说好久都没有做过纯上层的开发，现在做的智能家居一块的产品，更多的是倾向于底层着一块的实现，现在趁还没有怎么忘记，就把当时写的东西粘出来分享出来吧，希望能给大家啊一点小的帮助；
主要涉及到的东西就是滑动的算法，onLayout的使用，android系统手势的操作，自定义控件的开发等。
也写了好久了：不赘述，直接上代码：
这是自定义的CustomSurfaceView
package com.example.surfaceviewdemo;import android.content.Context;import android.util.AttributeSet;import android.util.FloatMath;import android.util.Log;import android.view.GestureDetector;import android.view.Gravity;import android.view.MotionEvent;import android.view.ScaleGestureDetector;import android.view.SurfaceView;import android.view.View;import android.view.ViewConfiguration;import android.widget.LinearLayout;import android.widget.LinearLayout.LayoutParams;public class CustomSurfaceView extends SurfaceView { public static final String TAG = "MyGesture"; GestureDetector mGestureDetector = null; ScaleGestureDetector scaleGestureDetector = null; private int screenHeight = 0; private int screenWidth = 0; /** 记录是拖拉照片模式还是放大缩小照片模式 */ private int mode = 0;// 初始状态 /** 拖拉照片模式 */ private static final int MODE_DRAG = 1; /** 放大缩小照片模式 */ private static final int MODE_ZOOM = 2; private static final int MODE_DOUBLE_CLICK = 3; private long firstTime = 0; private static final float SCALE_MAX = 4.0f; private static float touchSlop = 0; private int start_Top = -1, start_Right = -1, start_Left = -1, start_Bottom = -1; private int start_x, start_y, current_x, current_y; View view; private int View_Width = 0; private int View_Height = 0; private int initViewWidth = 0; private int initViewHeight = 0; private int fatherView_W; private int fatherView_H; private int fatherTop; private int fatherBottom; int distanceX = 0; int distanceY = 0; private boolean isControl_Vertical = false; private boolean isControl_Horizal = false; private float ratio = 0.3f; public CustomSurfaceView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); init(); } public CustomSurfaceView(Context context, AttributeSet attrs) { super(context, attrs); init(); } public CustomSurfaceView(Context context) { super(context); init(); } @SuppressWarnings("deprecation") private void init() { touchSlop = ViewConfiguration.getTouchSlop(); this.setFocusable(true); this.setClickable(true); this.setLongClickable(true); view = CustomSurfaceView.this; screenHeight = ScreenUtils.getScreenHeight(getContext()); screenWidth = ScreenUtils.getScreenWidth(getContext()); scaleGestureDetector = new ScaleGestureDetector(getContext(), new simpleScaleGestueListener()); mGestureDetector = new GestureDetector(new simpleGestureListener()); } @Override public boolean onTouchEvent(MotionEvent event) { mGestureDetector.onTouchEvent(event); switch (event.getAction() & MotionEvent.ACTION_MASK) { case MotionEvent.ACTION_DOWN: onTouchDown(event); break; case MotionEvent.ACTION_POINTER_DOWN: onPointerDown(event); break; case MotionEvent.ACTION_MOVE: onTouchMove(event); break; case MotionEvent.ACTION_UP: mode = 0; break; case MotionEvent.ACTION_POINTER_UP: mode = 0; break; default: break; } return scaleGestureDetector.onTouchEvent(event); } /** * 滑动事件分发 * * @param event */ private void onTouchMove(MotionEvent event) { int left = 0, top = 0, right = 0, bottom = 0; if (mode == MODE_DRAG) { left = getLeft(); right = getRight(); top = getTop(); bottom = getBottom(); distanceX = (int) (event.getRawX() - current_x); distanceY = (int) (event.getRawY() - current_y); if(icallBack!=null){ icallBack.getAngle((int)getX(),this.getWidth()); } if (touchSlop <= getDistance(distanceX, distanceY)) { left = left + distanceX; right = right + distanceX; bottom = bottom + distanceY; top = top + distanceY; // 水平判断 if (isControl_Horizal) { if (left >= 0) { left = 0; right = this.getWidth(); } if (right <= screenWidth) { left = screenWidth - this.getWidth(); right = screenWidth; } } else { left = getLeft(); right = getRight(); } // 垂直判断 if (isControl_Vertical) { if (top > 0) { top = 0; bottom = this.getHeight(); } if (bottom <= start_Bottom) { bottom = start_Bottom; top = fatherView_H - this.getWidth(); } } else { top = this.getTop(); bottom = this.getBottom(); } if (isControl_Horizal || isControl_Vertical) { this.setPosition(left, top, right, bottom); } current_x = (int) event.getRawX(); current_y = (int) event.getRawY(); } } } /** * 多点触控时 * * @param event */ private void onPointerDown(MotionEvent event) { if (event.getPointerCount() == 2) { mode = MODE_ZOOM; } } /** * 按下时的事件 * * @param event */ private void onTouchDown(MotionEvent event) { mode = MODE_DRAG; start_x = (int) event.getRawX(); start_y = (int) event.getRawY(); current_x = (int) event.getRawX(); current_y = (int) event.getRawY(); View_Width = getWidth(); View_Height = getHeight(); if (View_Height > fatherView_H) { isControl_Vertical = true; } else { isControl_Vertical = false; } if (View_Width > fatherView_W) { isControl_Horizal = true; } else { isControl_Horizal = false; } } @Override protected void onLayout(boolean changed, int left, int top, int right, int bottom) { super.onLayout(changed, left, top, right, bottom); if (start_Top == -1) { start_Top = top; start_Left = left; start_Right = right; start_Bottom = bottom; initViewWidth = view.getWidth(); initViewHeight = view.getHeight(); } } /** * 缩放手势的监听事件 * * @author Administrator * */ private class simpleScaleGestueListener implements ScaleGestureDetector.OnScaleGestureListener { // 用到的放大缩小的方法 @Override public boolean onScale(ScaleGestureDetector detector) { int left = 0, right = 0, top = 0, bottom = 0; float length = 0; if (mode == MODE_ZOOM) { float ratio = detector.getScaleFactor(); left = getLeft(); top = getTop(); bottom = getBottom(); right = getRight(); if (ratio > 1) { // 放大撞状态 length = (int) ((getHeight() * (ratio - 1)) / 7.0); left = (int) (left - length / 2); right = (int) (right + length / 2); bottom = (int) (bottom + length / 2); top = (int) (top - length / 2); if (getWidth() <= (screenWidth * 3) && getHeight() <= (fatherView_H * 3)) { setPosition(left, top, right, bottom); } } else { length = (int) ((getHeight() * (1 - ratio)) / 7.0); left = (int) (left + length / 2); right = (int) (right - length / 2); bottom = (int) (bottom - length / 2); top = (int) (top + length / 2); if (left >= 0) { left = 0; } if (right <= screenWidth) { right = screenWidth; } if (top >= 0) { top = 0; } if (bottom <= fatherView_H) { bottom = fatherView_H; } if (getWidth() > initViewWidth && getHeight() > fatherView_H) { setPosition(left, top, right, bottom); } else { setPosition(start_Left, start_Top, start_Right, start_Bottom); } } } return false; } @Override public boolean onScaleBegin(ScaleGestureDetector detector) { return true; } @Override public void onScaleEnd(ScaleGestureDetector detector) { } } /** * 双击事件的处理 * * @author Administrator * */ private class simpleGestureListener extends GestureDetector.SimpleOnGestureListener { // 用到的双击的方法 public boolean onDoubleTap(MotionEvent e) { Log.i(TAG, "双击屏幕"); // 双击屏幕 int left = 0, top = 0, right = 0, bottom = 0; int length = 0; left = getLeft(); top = getTop(); bottom = getBottom(); right = getRight(); if (getHeight() > fatherView_H) { // 缩小模式 Log.i(TAG, "缩小模式"); while (getHeight() > fatherView_H) { length = (int) ((getHeight() * ratio) / 5.0); left = (int) (getLeft() + length / 2); right = (int) (getRight() - length / 2); bottom = (int) (getBottom() - length / 2); top = (int) (getTop() + length / 2); if (left >= 0) { left = 0; } if (right <= screenWidth) { right = screenWidth; } if (top >= 0) { top = 0; } if (bottom <= fatherView_H) { bottom = fatherView_H; } if (getWidth() > initViewWidth && getHeight() > fatherView_H) { setPosition(left, top, right, bottom); } else { setPosition(start_Left, start_Top, start_Right, start_Bottom); } try { Thread.sleep(10); } catch (InterruptedException e1) { e1.printStackTrace(); } } } else { // 放大模式 Log.i(TAG, "放大模式"); if (getHeight() <= fatherView_H) { while (getHeight() < initViewHeight * 2) { length = (int) ((getHeight() * ratio) / 5.0); left = (int) (getLeft() - length / 2); right = (int) (getRight() + length / 2); bottom = (int) (getBottom() + length / 2); top = (int) (getTop() - length / 2); if (getWidth() <= (screenWidth * 3) && getHeight() <= (fatherView_H * 3)) { setPosition(left, top, right, bottom); } try { Thread.sleep(10); } catch (InterruptedException e1) { e1.printStackTrace(); } } } } return true; } } /** 实现拖动的处理 */ private void setPosition(int left, int top, int right, int bottom) { this.layout(left, top, right, bottom); } /** * surfaceView父控件的宽高 * * @param fatherView_Width * @param fatherView_Height */ public void setFatherW_H(int fatherView_Width, int fatherView_Height) { this.fatherView_W = fatherView_Width; this.fatherView_H = fatherView_Height; } public void setLayoutParam(float scale) { LinearLayout.LayoutParams layoutParams = (LayoutParams) getLayoutParams(); layoutParams.gravity = Gravity.CENTER; layoutParams.width = (int) (scale * (layoutParams.width)); layoutParams.height = (int) (scale * (layoutParams.height)); setLayoutParams(layoutParams); } /** 获取两点的距离 **/ private float getDistance(float distanceX, float distanceY) { return FloatMath.sqrt(distanceX * distanceX + distanceY * distanceY); } public void setFatherTopAndBottom(int fatherTop, int fatherBottom) { this.fatherTop = fatherTop; this.fatherBottom = fatherBottom; } /** * 一定一个接口 */ public interface ICoallBack { void getAngle(int angle, int viewW); } /** * 初始化接口变量 */ ICoallBack icallBack = null; /** * 自定义控件的自定义事件 */ public void setEvent(ICoallBack iBack) { icallBack = iBack; }}仿360的那个小滑动条
package com.example.surfaceviewdemo;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.RectF;import android.util.AttributeSet;import android.util.DisplayMetrics;import android.util.Log;import android.view.View;public class CustomMonitorMenu extends View { public final int R1 = 100; public final int R2 = 8; //每一格 cos y的差距 public float width; public float height; public float screenWidth; public float screenHeight; public int startAngle = 235; //新的角度 开始时30 public float initialAngle = 0.1f; //初始弧度30 public int sweepAngle = 70; //角度 public double newX; public double newY; //给小圆球提供位置 空间移动到这个位置上面去 public Paint mPaint2; public Paint mPaint3; public Paint mPaint4; public boolean flag = false; public Paint mPaint; public Context mContext; public String Sangle = "0"; public String Eangle = "120"; /** * 一定一个接口 */ public interface ICoallBack { void getAngle(int angle); } /** * 初始化接口变量 */ ICoallBack icallBack = null; /** * 自定义控件的自定义事件 */ public void setEvent(ICoallBack iBack) { icallBack = iBack; } public CustomMonitorMenu(Context context) { super(context); this.mContext = context; this.setLayerType(View.LAYER_TYPE_SOFTWARE, null); initView();// setWillNotDraw(false); } public CustomMonitorMenu(Context context, AttributeSet attrs) { super(context, attrs); this.mContext = context; this.setLayerType(View.LAYER_TYPE_SOFTWARE, null); initView();// setWillNotDraw(false); } public void setindex(int initAng, int viewW) { int viewX = (int) (viewW - screenWidth); if (viewX != 0) { initialAngle = Math.abs(initAng) * sweepAngle / viewX; }else { viewW = 1; } if (initialAngle >= 0 && initialAngle <= 70) { initialAngle = 35 - initialAngle; } Log.e("hgz------->", " initAng = " + Math.abs(initAng) + " initialAngle = " + initialAngle + " viewX = " + viewX); invalidate(); } private void initView() { mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); mPaint.setColor(Color.BLACK); mPaint.setAntiAlias(true); mPaint.setStrokeWidth(2.0f); mPaint.setStyle(Paint.Style.STROKE); mPaint2 = new Paint(Paint.ANTI_ALIAS_FLAG); // 抗锯齿 mPaint2.setColor(Color.BLACK); mPaint2.setStrokeWidth(2.0f); mPaint2.setStrokeJoin(Paint.Join.ROUND); // 让画的线圆滑 mPaint2.setStrokeCap(Paint.Cap.ROUND); mPaint3 = new Paint(); mPaint3.setColor(Color.BLACK); mPaint3.setStrokeWidth(2.0f); mPaint3.setStyle(Paint.Style.STROKE); mPaint3.setAntiAlias(true); mPaint4 = new Paint(Paint.ANTI_ALIAS_FLAG); mPaint4.setStrokeWidth(1); mPaint4.setTextSize(16); mPaint4.setStyle(Paint.Style.STROKE); mPaint4.setColor(Color.BLACK);// 下面这行是实现水平居中，drawText对应改为传入targetRect.centerX()// mPaint4.setTextAlign(Paint.Align.CENTER);// 根据屏幕的宽高确定圆心的坐标 DisplayMetrics metric = new DisplayMetrics(); ((MainActivity) mContext).getWindowManager().getDefaultDisplay().getMetrics(metric);// 屏幕的宽高 screenWidth = metric.widthPixels; screenHeight = metric.heightPixels;// 圆心位置坐标 width = metric.widthPixels / 2.0f; height = metric.heightPixels / 8.0f; Log.e("aaa--->圆心的坐标：", width + "---" + height); } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); RectF oval1 = new RectF(width - 100, height - 100, width + 100, height + 100); canvas.drawArc(oval1, startAngle, sweepAngle, false, mPaint);//小弧形 Log.e("ooo--->", "圆环的圆心的坐标 ： width " + width + " height " + height);// getNewLocation(initialAngle); //根据判断 来移动小球 获得新的位置 canvas.drawLine(width, (height - R1), width, (height - R1) + 10, mPaint3); canvas.drawText(Sangle, (float) (width - Math.sin(35 * Math.PI / 180) * R1) - 20, (float) (height - Math.cos(35 * Math.PI / 180) * R1) + 10, mPaint4); canvas.drawText(Eangle, (float) (width + Math.sin(35 * Math.PI / 180) * R1) + 8, (float) (height - Math.cos(35 * Math.PI / 180) * R1) + 10, mPaint4);// canvas.drawCircle((float) newX, (float) newY, R2, mPaint2); canvas.drawLine((float) (width - Math.sin(35 * Math.PI / 180) * R1), (float) (height - Math.cos(35 * Math.PI / 180) * R1), (float) (width - Math.sin(35 * Math.PI / 180) * R1) - 5.0f, (float) (height - Math.cos(35 * Math.PI / 180) * R1) - 6.0f, mPaint3); canvas.drawLine((float) (width - Math.sin(35 * Math.PI / 180) * R1), (float) (height - Math.cos(35 * Math.PI / 180) * R1), (float) (width - Math.sin(35 * Math.PI / 180) * R1) + 5.0f, (float) (height - Math.cos(35 * Math.PI / 180) * R1) + 6.0f, mPaint3); canvas.drawLine((float) (width + Math.sin(35 * Math.PI / 180) * R1), (float) (height - Math.cos(35 * Math.PI / 180) * R1), (float) (width + Math.sin(35 * Math.PI / 180) * R1) + 5.0f, (float) (height - Math.cos(35 * Math.PI / 180) * R1) - 6.0f, mPaint3); canvas.drawLine((float) (width + Math.sin(35 * Math.PI / 180) * R1), (float) (height - Math.cos(35 * Math.PI / 180) * R1), (float) (width + Math.sin(35 * Math.PI / 180) * R1) - 5.0f, (float) (height - Math.cos(35 * Math.PI / 180) * R1) + 6.0f, mPaint3);// canvas.drawCircle((float) (width - Math.sin(35 * Math.PI / 180) * R1), (float) (height - Math.cos(35 * Math.PI / 180) * R1), R2, mPaint2); canvas.drawCircle((float) (width - Math.sin(initialAngle * Math.PI / 180) * R1), (float) (height - Math.cos(initialAngle * Math.PI / 180) * R1), R2, mPaint2); Log.e("hgz", "小球的坐标：" + (float) (width - Math.sin(initialAngle * Math.PI / 180) * R1) + " " + (float) (height - Math.cos(initialAngle * Math.PI / 180) * R1));// canvas.drawCircle((float) (width + Math.sin(35 * Math.PI / 180) * R1), (float) (height - Math.cos(35 * Math.PI / 180) * R1), R2, mPaint2); }}ScreenUtils尺寸工具类
package com.example.surfaceviewdemo;import android.app.Activity;import android.content.Context;import android.graphics.Bitmap;import android.graphics.Rect;import android.util.DisplayMetrics;import android.view.View;import android.view.WindowManager;public class ScreenUtils { private ScreenUtils() { /* cannot be instantiated */ throw new UnsupportedOperationException("cannot be instantiated"); } /** * 获得屏幕高度 * * @param context * @return */ public static int getScreenWidth(Context context) { WindowManager wm = (WindowManager) context .getSystemService(Context.WINDOW_SERVICE); DisplayMetrics outMetrics = new DisplayMetrics(); wm.getDefaultDisplay().getMetrics(outMetrics); return outMetrics.widthPixels; } /** * 获得屏幕宽度 * * @param context * @return */ public static int getScreenHeight(Context context) { WindowManager wm = (WindowManager) context .getSystemService(Context.WINDOW_SERVICE); DisplayMetrics outMetrics = new DisplayMetrics(); wm.getDefaultDisplay().getMetrics(outMetrics); return outMetrics.heightPixels; } /** * 获得状态栏的高度 * * @param context * @return */ public static int getStatusHeight(Context context) { int statusHeight = -1; try { Class<?> clazz = Class.forName("com.android.internal.R$dimen"); Object object = clazz.newInstance(); int height = Integer.parseInt(clazz.getField("status_bar_height") .get(object).toString()); statusHeight = context.getResources().getDimensionPixelSize(height); } catch (Exception e) { e.printStackTrace(); } return statusHeight; } /** * 获取当前屏幕截图，包含状态栏 * * @param activity * @return */ public static Bitmap snapShotWithStatusBar(Activity activity) { View view = activity.getWindow().getDecorView(); view.setDrawingCacheEnabled(true); view.buildDrawingCache(); Bitmap bmp = view.getDrawingCache(); int width = getScreenWidth(activity); int height = getScreenHeight(activity); Bitmap bp = null; bp = Bitmap.createBitmap(bmp, 0, 0, width, height); view.destroyDrawingCache(); return bp; } /** * 获取当前屏幕截图，不包含状态栏 * * @param activity * @return */ public static Bitmap snapShotWithoutStatusBar(Activity activity) { View view = activity.getWindow().getDecorView(); view.setDrawingCacheEnabled(true); view.buildDrawingCache(); Bitmap bmp = view.getDrawingCache(); Rect frame = new Rect(); activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame); int statusBarHeight = frame.top; int width = getScreenWidth(activity); int height = getScreenHeight(activity); Bitmap bp = null; bp = Bitmap.createBitmap(bmp, 0, statusBarHeight, width, height - statusBarHeight); view.destroyDrawingCache(); return bp; } }主Activity
package com.example.surfaceviewdemo;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;public class SplashActivity extends Activity{ Button btnstartPortActivity; Button btnstartLandActivity; @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); setContentView(R.layout.splash_layout); btnstartLandActivity = (Button) findViewById(R.id.start_landscape_activity); btnstartPortActivity = (Button) findViewById(R.id.start_portable_activity); btnstartPortActivity.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Intent intent = new Intent(SplashActivity.this,MainActivity.class); startActivity(intent); } }); btnstartLandActivity.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Intent intent = new Intent(SplashActivity.this,DemoActivty.class); startActivity(intent); } }); }}纵屏播放Activity
package com.example.surfaceviewdemo;import java.io.IOException;import android.app.Activity;import android.content.res.AssetFileDescriptor;import android.media.AudioManager;import android.media.MediaPlayer;import android.os.Bundle;import android.util.Log;import android.view.Gravity;import android.view.Menu;import android.view.SurfaceHolder;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.LinearLayout;import android.widget.LinearLayout.LayoutParams;import com.example.surfaceviewdemo.CustomSurfaceView.ICoallBack;public class MainActivity extends Activity { public static final String TAG = "MyGesture"; Button btn_start; Button btn_end; CustomSurfaceView customSurfaceView; private SurfaceHolder surfaceHolder; private MediaPlayer mediaPlayer; String pathVideo; LinearLayout line_view; private int fatherView_W; private int fatherView_H; CustomMonitorMenu customMonitorMenu; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); btn_start = (Button) findViewById(R.id.start_vedio); btn_end = (Button) findViewById(R.id.stop_vedio); line_view = (LinearLayout) findViewById(R.id.line_view); customSurfaceView = (CustomSurfaceView) findViewById(R.id.hv_scrollView); LayoutParams layoutParams = (LayoutParams) customSurfaceView.getLayoutParams(); layoutParams.width = (int) (ScreenUtils.getScreenWidth(getApplicationContext()) * (1.2)); layoutParams.gravity = Gravity.CENTER; customMonitorMenu = (CustomMonitorMenu) findViewById(R.id.custom_Menu); customSurfaceView.setLayoutParams(layoutParams); initgetViewW_H(); btn_start.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { playSurfaceView(); } }); btn_end.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { stopSurfaceView(); } }); surfaceHolder = customSurfaceView.getHolder(); surfaceHolder.setFixedSize(800, 800); surfaceHolder.setKeepScreenOn(true); surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); surfaceHolder.addCallback(new SurfaceHolder.Callback() { @Override public void surfaceCreated(SurfaceHolder holder) { } @Override public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { } @Override public void surfaceDestroyed(SurfaceHolder holder) { if (mediaPlayer != null && mediaPlayer.isPlaying()) { mediaPlayer.stop(); } } }); customSurfaceView.setEvent(new ICoallBack() { @Override public void getAngle(int angle, int viewW) { if (customMonitorMenu != null) { customMonitorMenu.setindex(angle, viewW); } } }); } private void initgetViewW_H() { line_view.postDelayed(new Runnable() { @Override public void run() { fatherView_W = line_view.getWidth(); fatherView_H = line_view.getHeight(); Log.i(TAG, "father Top" + line_view.getTop()); Log.i(TAG, "father Bottom" + line_view.getBottom()); customSurfaceView.setFatherW_H(line_view.getTop(), line_view.getBottom()); customSurfaceView.setFatherTopAndBottom(line_view.getTop(), line_view.getBottom()); } }, 100); } // 鏆傚仠 public void stopSurfaceView() { if (mediaPlayer != null && mediaPlayer.isPlaying()) { mediaPlayer.stop(); mediaPlayer.release(); mediaPlayer = null; } } // 寮�濮嬫挱鏀捐棰� public void playSurfaceView() { try { if (mediaPlayer == null) { mediaPlayer = new MediaPlayer(); } mediaPlayer.reset(); AssetFileDescriptor in = getResources().getAssets().openFd("hgz.mp4"); mediaPlayer.setDataSource(in.getFileDescriptor(), in.getStartOffset(), in.getLength()); mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC); mediaPlayer.setDisplay(surfaceHolder); mediaPlayer.prepare(); mediaPlayer.start(); } catch (IOException e) { e.printStackTrace(); } } @Override protected void onDestroy() { super.onDestroy(); if (mediaPlayer != null && mediaPlayer.isPlaying()) { mediaPlayer.stop(); mediaPlayer.release(); mediaPlayer = null; } } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.main, menu); return true; }}横屏幕播放Activity
package com.example.surfaceviewdemo;import java.io.IOException;import android.app.Activity;import android.content.res.AssetFileDescriptor;import android.media.AudioManager;import android.media.MediaPlayer;import android.os.Bundle;import android.util.Log;import android.view.Gravity;import android.view.Menu;import android.view.SurfaceHolder;import android.view.View;import android.view.View.OnClickListener;import android.widget.BaseAdapter;import android.widget.Button;import android.widget.LinearLayout;import android.widget.LinearLayout.LayoutParams;public class DemoActivty extends Activity { public static final String TAG = "MyGesture"; Button btn_start; Button btn_end; CustomSurfaceView customSurfaceView; private SurfaceHolder surfaceHolder; private MediaPlayer mediaPlayer; String pathVideo; LinearLayout line_view; private int fatherView_W; private int fatherView_H; @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); setContentView(R.layout.demo_layout); btn_start = (Button) findViewById(R.id.start_vedio); btn_end = (Button) findViewById(R.id.stop_vedio); line_view = (LinearLayout) findViewById(R.id.line_view); customSurfaceView = (CustomSurfaceView) findViewById(R.id.hv_scrollView); LayoutParams layoutParams = (LayoutParams) customSurfaceView.getLayoutParams(); layoutParams.gravity = Gravity.CENTER; customSurfaceView.setLayoutParams(layoutParams); initgetViewW_H(); btn_start.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { playSurfaceView(); } }); btn_end.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { stopSurfaceView(); } }); surfaceHolder = customSurfaceView.getHolder(); surfaceHolder.setFixedSize(800, 800); surfaceHolder.setKeepScreenOn(true); surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); surfaceHolder.addCallback(new SurfaceHolder.Callback() { @Override public void surfaceCreated(SurfaceHolder holder) { } @Override public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { } @Override public void surfaceDestroyed(SurfaceHolder holder) { if (mediaPlayer != null && mediaPlayer.isPlaying()) { mediaPlayer.stop(); } } }); } private void initgetViewW_H() { line_view.postDelayed(new Runnable() { @Override public void run() { fatherView_W = line_view.getWidth(); fatherView_H = line_view.getHeight(); Log.i(TAG, "father Top" + line_view.getTop()); Log.i(TAG, "father Bottom" + line_view.getBottom()); customSurfaceView.setFatherW_H(line_view.getTop(), line_view.getBottom()); customSurfaceView.setFatherTopAndBottom(line_view.getTop(), line_view.getBottom()); } }, 100); } // 鏆傚仠 public void stopSurfaceView() { if (mediaPlayer != null && mediaPlayer.isPlaying()) { mediaPlayer.stop(); mediaPlayer.release(); mediaPlayer = null; } } // 寮�濮嬫挱鏀捐棰� public void playSurfaceView() { try { if (mediaPlayer == null) { mediaPlayer = new MediaPlayer(); } mediaPlayer.reset(); AssetFileDescriptor in = getResources().getAssets().openFd("hgz.mp4"); mediaPlayer.setDataSource(in.getFileDescriptor(), in.getStartOffset(), in.getLength()); mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC); mediaPlayer.setDisplay(surfaceHolder); mediaPlayer.prepare(); mediaPlayer.start(); } catch (IOException e) { e.printStackTrace(); } } @Override protected void onDestroy() { super.onDestroy(); if (mediaPlayer != null && mediaPlayer.isPlaying()) { mediaPlayer.stop(); mediaPlayer.release(); mediaPlayer = null; } } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.main, menu); return true; }}因为这个代码写了已经有八九个月了，之前很多东西都是总结在有道云笔记当中，这段时间把它转移到Csdn上来，所以才把它拿出来，可能也有些写的不好，希望吧 能给大家一点帮助，源代码是可以直接run的，
源代码地址：源码地址
如果有什么疑问的或者缺陷的地方也可以及时联系作者
谢谢大家的观看
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