ImageView縮放不放大或縮小

Question

我有一個ImageView縮放應用程序在我的手機上運行，​​當我第一次運行它時，圖像工作和縮放以及後，我做了一個鏈接按鈕到圖像視圖，與以前的應用程序相同，圖像出現但沒有縮放，並且根本不移動

有人可以幫忙嗎？

mapslocations.xml

<Button 
         android:id="@+id/powerstationread" 
         android:layout_width="fill_parent" 
         android:layout_height="45dp" 
         android:layout_alignParentRight="true" 
         android:layout_alignParentTop="true" 
         android:layout_weight="1" 
         android:gravity="center" 
         android:text="Map" 
         android:textSize="10sp" 
         android:textStyle="italic" /> 

Sites.java

package com.f.fa; 

import android.annotation.SuppressLint; 
import android.app.Activity; 
import android.graphics.Matrix; 
import android.graphics.PointF; 
import android.os.Bundle; 
import android.util.FloatMath; 
import android.view.MotionEvent; 
import android.view.View; 
import android.widget.ImageView; 

public class Sites extends Activity { 
ImageView imageDetail1; 
Matrix matrix = new Matrix(); 
Matrix savedMatrix = new Matrix(); 
PointF startPoint = new PointF(); 
PointF midPoint = new PointF(); 
float oldDist = 1f; 
static final int NONE = 0; 
static final int DRAG = 1; 
static final int ZOOM = 2; 
int mode = NONE; 

/** Called when the activity is first created. */ 
@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.mapslocations); 
    imageDetail1 = (ImageView) findViewById(R.id.powerstationread); 
    /** 
    * set on touch listner on image 
    */ 
    imageDetail1.setOnTouchListener(new View.OnTouchListener() { 

    @Override 
    public boolean onTouch(View v, MotionEvent event) { 

    ImageView view = (ImageView) v; 
    System.out.println("matrix=" + savedMatrix.toString()); 
    switch (event.getAction() & MotionEvent.ACTION_MASK) { 
    case MotionEvent.ACTION_DOWN: 

    savedMatrix.set(matrix); 
    startPoint.set(event.getX(), event.getY()); 
    mode = DRAG; 
    break; 

    case MotionEvent.ACTION_POINTER_DOWN: 

    oldDist = spacing(event); 

    if (oldDist > 10f) { 
     savedMatrix.set(matrix); 
     midPoint(midPoint, event); 
     mode = ZOOM; 
    } 
    break; 

    case MotionEvent.ACTION_UP: 

    case MotionEvent.ACTION_POINTER_UP: 
    mode = NONE; 

    break; 

    case MotionEvent.ACTION_MOVE: 
    if (mode == DRAG) { 
     matrix.set(savedMatrix); 
     matrix.postTranslate(event.getX() - startPoint.x, 
     event.getY() - startPoint.y); 
    } else if (mode == ZOOM) { 
     float newDist = spacing(event); 
     if (newDist > 10f) { 
     matrix.set(savedMatrix); 
     float scale = newDist/oldDist; 
     matrix.postScale(scale, scale, midPoint.x, midPoint.y); 
     } 
    } 
    break; 

    } 
    view.setImageMatrix(matrix); 

    return true; 
    } 

    @SuppressLint("FloatMath") 
    private float spacing(MotionEvent event) { 
    float x = event.getX(0) - event.getX(1); 
    float y = event.getY(0) - event.getY(1); 
    return FloatMath.sqrt(x * x + y * y); 
    } 
    private void midPoint(PointF point, MotionEvent event) { 
    float x = event.getX(0) + event.getX(1); 
    float y = event.getY(0) + event.getY(1); 
    point.set(x/2, y/2); 
    } 
    }); 
} 
} 

imageview1.xml

<ImageView 
    android:id="@+id/powerstationread" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:scaleType="matrix" 
    android:src="@drawable/powerstationwallmap" /> 

PagePowerstation.java

package com.f.fa; 

import android.app.Activity; 
import android.os.Bundle; 
import android.widget.Button; 

public class PagePowerstation extends Activity { 

    Button imageview1; 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.imageview1); 
    } 
} 

Answer 1

它在Sites.java中有效，因爲你在那裏有所有的代碼來使它工作。

你正在做什麼，但在PagePowerstation.java

設置視圖居然把變焦碼在那裏，它應該工作。