{ 
    MSCALE_X, MSKEW_X, MTRANS_X,  
        MSKEW_Y, MSCALE_Y, MTRANS_Y,  
        MPERSP_0, MPERSP_1, MPERSP_2  
};  

Matrix transMatrix = new Matrix(); 
    float[] values = new float[] { 1.0, 0, 200, 0, 1.0, 100, 0, 0, 1.0 }; 
    transMatrix.setValues(values); 

Matrix transMatrix = new Matrix(); 
    transMatrix.postTranslate(200, 100); 

public final float getScale() 
  { 
    scaleMatrix.getValues(matrixValues); 
    return matrixValues[Matrix.MSCALE_X]; 
  } 

package com.zhy.view; 
 
import android.content.Context; 
import android.graphics.Matrix; 
import android.graphics.drawable.Drawable; 
import android.util.AttributeSet; 
import android.util.Log; 
import android.view.MotionEvent; 
import android.view.ScaleGestureDetector; 
import android.view.ScaleGestureDetector.OnScaleGestureListener; 
import android.view.View; 
import android.view.View.OnTouchListener; 
import android.view.ViewTreeObserver; 
import android.widget.ImageView; 
 
public class ZoomImageView extends ImageView implements OnScaleGestureListener, 
    OnTouchListener, ViewTreeObserver.OnGlobalLayoutListener 
 
{ 
  private static final String TAG = ZoomImageView.class.getSimpleName(); 
   
  public static final float SCALE_MAX = 4.0f; 
  /** 
   * 初始化时的缩放比例，如果图片宽或高大于屏幕，此值将小于0 
   */ 
  private float initScale = 1.0f; 
 
  /** 
   * 用于存放矩阵的9个值 
   */ 
  private final float[] matrixValues = new float[9]; 
 
  private boolean once = true; 
 
  /** 
   * 缩放的手势检测 
   */ 
  private ScaleGestureDetector mScaleGestureDetector = null; 
 
  private final Matrix mScaleMatrix = new Matrix(); 
 
  public ZoomImageView(Context context) 
  { 
    this(context, null); 
  } 
 
  public ZoomImageView(Context context, AttributeSet attrs) 
  { 
    super(context, attrs); 
    super.setScaleType(ScaleType.MATRIX); 
    mScaleGestureDetector = new ScaleGestureDetector(context, this); 
    this.setOnTouchListener(this); 
  } 
 
  @Override 
  public boolean onScale(ScaleGestureDetector detector) 
  { 
    float scale = getScale(); 
    float scaleFactor = detector.getScaleFactor(); 
 
    if (getDrawable() == null) 
      return true; 
 
    /** 
     * 缩放的范围控制 
     */ 
    if ((scale < SCALE_MAX && scaleFactor > 1.0f) 
        || (scale > initScale && scaleFactor < 1.0f)) 
    { 
      /** 
       * 最大值最小值判断 
       */ 
      if (scaleFactor * scale < initScale) 
      { 
        scaleFactor = initScale / scale; 
      } 
      if (scaleFactor * scale > SCALE_MAX) 
      { 
        scaleFactor = SCALE_MAX / scale; 
      } 
      /** 
       * 设置缩放比例 
       */ 
      mScaleMatrix.postScale(scaleFactor, scaleFactor, getWidth() / 2, 
          getHeight() / 2); 
      setImageMatrix(mScaleMatrix); 
    } 
    return true; 
 
  } 
 
  @Override 
  public boolean onScaleBegin(ScaleGestureDetector detector) 
  { 
    return true; 
  } 
 
  @Override 
  public void onScaleEnd(ScaleGestureDetector detector) 
  { 
  } 
 
  @Override 
  public boolean onTouch(View v, MotionEvent event) 
  { 
    return mScaleGestureDetector.onTouchEvent(event); 
 
  } 
 
   
  /** 
   * 获得当前的缩放比例 
   * 
   * @return 
   */ 
  public final float getScale() 
  { 
    mScaleMatrix.getValues(matrixValues); 
    return matrixValues[Matrix.MSCALE_X]; 
  } 
 
  @Override 
  protected void onAttachedToWindow() 
  { 
    super.onAttachedToWindow(); 
    getViewTreeObserver().addOnGlobalLayoutListener(this); 
  } 
 
  @SuppressWarnings("deprecation") 
  @Override 
  protected void onDetachedFromWindow() 
  { 
    super.onDetachedFromWindow(); 
    getViewTreeObserver().removeGlobalOnLayoutListener(this); 
  } 
 
  @Override 
  public void onGlobalLayout() 
  { 
    if (once) 
    { 
      Drawable d = getDrawable(); 
      if (d == null) 
        return; 
      Log.e(TAG, d.getIntrinsicWidth() + " , " + d.getIntrinsicHeight()); 
      int width = getWidth(); 
      int height = getHeight(); 
      // 拿到图片的宽和高 
      int dw = d.getIntrinsicWidth(); 
      int dh = d.getIntrinsicHeight(); 
      float scale = 1.0f; 
      // 如果图片的宽或者高大于屏幕，则缩放至屏幕的宽或者高 
      if (dw > width && dh <= height) 
      { 
        scale = width * 1.0f / dw; 
      } 
      if (dh > height && dw <= width) 
      { 
        scale = height * 1.0f / dh; 
      } 
      // 如果宽和高都大于屏幕，则让其按按比例适应屏幕大小 
      if (dw > width && dh > height) 
      { 
        scale = Math.min(dw * 1.0f / width, dh * 1.0f / height); 
      } 
      initScale = scale; 
      // 图片移动至屏幕中心 
            mScaleMatrix.postTranslate((width - dw) / 2, (height - dh) / 2); 
      mScaleMatrix 
          .postScale(scale, scale, getWidth() / 2, getHeight() / 2); 
      setImageMatrix(mScaleMatrix); 
      once = false; 
    } 
 
  } 
 
} 

@Override 
  public boolean onTouch(View v, MotionEvent event) 
  { 
    return mScaleGestureDetector.onTouchEvent(event); 
 
  } 

/** 
       * 设置缩放比例 
       */ 
      mScaleMatrix.postScale(scaleFactor, scaleFactor, 
          detector.getFocusX(), detector.getFocusX()); 
      setImageMatrix(mScaleMatrix); 

/** 
   * 在缩放时，进行图片显示范围的控制 
   */ 
  private void checkBorderAndCenterWhenScale() 
  { 
 
    RectF rect = getMatrixRectF(); 
    float deltaX = 0; 
    float deltaY = 0; 
 
    int width = getWidth(); 
    int height = getHeight(); 
 
    // 如果宽或高大于屏幕，则控制范围 
    if (rect.width() >= width) 
    { 
      if (rect.left > 0) 
      { 
        deltaX = -rect.left; 
      } 
      if (rect.right < width) 
      { 
        deltaX = width - rect.right; 
      } 
    } 
    if (rect.height() >= height) 
    { 
      if (rect.top > 0) 
      { 
        deltaY = -rect.top; 
      } 
      if (rect.bottom < height) 
      { 
        deltaY = height - rect.bottom; 
      } 
    } 
    // 如果宽或高小于屏幕，则让其居中 
    if (rect.width() < width) 
    { 
      deltaX = width * 0.5f - rect.right + 0.5f * rect.width(); 
    } 
    if (rect.height() < height) 
    { 
      deltaY = height * 0.5f - rect.bottom + 0.5f * rect.height(); 
    } 
    Log.e(TAG, "deltaX = " + deltaX + " , deltaY = " + deltaY); 
 
    mScaleMatrix.postTranslate(deltaX, deltaY); 
 
  } 
 
  /** 
   * 根据当前图片的Matrix获得图片的范围 
   * 
   * @return 
   */ 
  private RectF getMatrixRectF() 
  { 
    Matrix matrix = mScaleMatrix; 
    RectF rect = new RectF(); 
    Drawable d = getDrawable(); 
    if (null != d) 
    { 
      rect.set(0, 0, d.getIntrinsicWidth(), d.getIntrinsicHeight()); 
      matrix.mapRect(rect); 
    } 
    return rect; 
  } 

/** 
       * 设置缩放比例 
       */ 
      mScaleMatrix.postScale(scaleFactor, scaleFactor, 
          detector.getFocusX(), detector.getFocusY()); 
      checkBorderAndCenterWhenScale(); 
      setImageMatrix(mScaleMatrix); 

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
  xmlns:tools="http://schemas.android.com/tools" 
  android:layout_width="match_parent" 
  android:layout_height="match_parent" > 
 
  <com.zhy.view.ZoomImageView 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:scaleType="matrix" 
    android:src="@drawable/xx" /> 
 
</RelativeLayout>