Android实现IOS相机滑动控件

package com.example.androidcustomnview;

import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.util.Log;
import android.view.GestureDetector;
import android.view.GestureDetector.OnGestureListener;
import android.view.View;
import android.view.View.OnTouchListener;
import android.view.MotionEvent;
import android.view.TextureView;
import android.view.ViewGroup;
import android.view.animation.Animation;
import android.view.animation.Animation.AnimationListener;
import android.view.animation.AnimationSet;
import android.view.animation.TranslateAnimation;
import android.widget.FrameLayout;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.TextView;

public class MainActivity extends Activity implements OnTouchListener{

 private static final String TAG = "MainActivity.TAG";
 CustomViewL mCustomViewL;
 String[] name = new String[] {"延时摄影","慢动作","视频","拍照","正方形","全景"};

 GestureDetector mGestureDetector;
 RelativeLayout rootView;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 mCustomViewL = (CustomViewL) findViewById(R.id.mCustomView);
 rootView = (RelativeLayout) findViewById(R.id.ViewRoot);
 rootView.setOnTouchListener(this);
 mCustomViewL.getParent();
 mCustomViewL.addIndicator(name);
 mGestureDetector = new GestureDetector(this, new myGestureDetectorLis()); 48 }
 
 class myGestureDetectorLis implements GestureDetector.OnGestureListener {
 
 private static final int degreeLimit = 30;
 private static final int distanceLimit = 15;
 
 private boolean isScroll = false;
 @Override
 public boolean onDown(MotionEvent e) {
  // TODO Auto-generated method stub
  Log.d(TAG, "myGestureDetectorLis onDown");
  isScroll = false;
  return true;
 }
 @Override
 public void onShowPress(MotionEvent e) {
  // TODO Auto-generated method stub
  
 }
 @Override
 public boolean onSingleTapUp(MotionEvent e) {
  // TODO Auto-generated method stub
  return false;
 }
 
 @Override
 public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,
  float distanceY) {
  // TODO Auto-generated method stub
  if (isScroll) return false;
  double degree = Math.atan(Math.abs(e2.getY() - e1.getY()) / Math.abs(e2.getX() - e1.getX())) * 180 /Math.PI;
  float delta = e2.getX() - e1.getX();
  if (delta > distanceLimit && degree 

package com.example.androidcustomnview;

import android.content.Context;
import android.graphics.Camera;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.LinearGradient;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.Shader;
import android.os.Handler;
import android.os.Message;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.view.WindowManager;
import android.view.animation.Animation;
import android.view.animation.Animation.AnimationListener;
import android.view.animation.TranslateAnimation;
import android.widget.LinearLayout;
import android.widget.TextView;

public class CustomViewL extends LinearLayout {

 private static final String TAG = "CustomViewL.TAG";
 private Matrix mMatrix;
 Camera mCamera;
 private int mCurrentItem = 2; 
 private int screenWidth;
 private Paint mPaint;

 public static final float ItemScale = 0.1f;

 public CustomViewL(Context context) {
 super(context);
 // TODO Auto-generated constructor stub
 initView(context);
 }
 
 public CustomViewL(Context context, AttributeSet attrs, int defStyleAttr,
  int defStyleRes) {
 super(context, attrs, defStyleAttr, defStyleRes);
 initView(context);
 }

 public CustomViewL(Context context, AttributeSet attrs, int defStyleAttr) {
 super(context, attrs, defStyleAttr);
 initView(context);
 }

 public CustomViewL(Context context, AttributeSet attrs) {
 super(context, attrs);
 initView(context);
 }
 
 private void initView(Context context) {
 screenWidth = ((WindowManager)getContext().getSystemService(Context.WINDOW_SERVICE))
  .getDefaultDisplay().getWidth();
 }
 
 @Override
 protected void onLayout(boolean changed, int l, int t, int r, int b) {
 Log.d(TAG, "onLayout ");
 super.onLayout(changed, l , t, r, b);
 View v = getChildAt(mCurrentItem);
 int delta = getWidth() / 2 - v.getLeft() - v.getWidth()/2;
  
 for (int i = 0; i  mCurrentItem; j--) {
   View v2 = getChildAt(j);
   move += (int)(v2.getWidth() * Math.abs(j - mCurrentItem) * ItemScale);
  }
  move = -move;
  }
  v1.layout(v1.getLeft() + delta + move, v1.getTop(), 
   v1.getRight() + delta + move, v1.getBottom());
 }
 mRequstLayout = false;
 }

 @Override
 protected void dispatchDraw(Canvas canvas) {
 int count = getChildCount();
 for (int i = 0; i  0) {
  if (mAnimationRunning) {
  if (AnimationRunningCount <1) {
   currentItemCopy = mCurrentItem - 1;
   AnimationRunningCount++;
   scroolToRight = true;
  }
  return;
  }
  mCurrentItem--;
  startTraAnimation(mCurrentItem,mCurrentItem + 1);
  updateTextColor();
 }
 }
 
 private int currentItemCopy;
 public void scrollLeft() {
 if (mRequstLayout) return;
 if (mCurrentItem  0) {
  CustomViewL.this.post(new Runnable() {
   @Override
   public void run() {
   // TODO Auto-generated method stub
   AnimationRunningCount--;
   mCurrentItem = currentItemCopy;
   int lastItem = scroolToRight &＃63; currentItemCopy + 1 : currentItemCopy - 1;
   startTraAnimation(currentItemCopy,lastItem);
   updateTextColor();
   }
  });
  }
 }
 @Override
 public void onAnimationRepeat(Animation animation) {
 }
 
 }
 
 private int AnimitiOnDurationTime= 300;
 private int AnimatiOnRunningCount= 0;
 private boolean mAnimatiOnRunning= false;
 private boolean mRequstLayout = false;
 public void startTraAnimation(int item,int last) {
 Log.d(TAG, "startTraAnimation item = " + item);
 View v = getChildAt(item);
 final int width = v.getWidth();
 final int childCount = getChildCount();
 int traslate = getWidth()/2 - v.getLeft() - width/2;
 
 int currentItemWidthScale = (int) (width * ItemScale);

 for (int i = 0; i