IllegalArgumentException：宽度和高度必须> 0

我想在画布中绘制一个位图，但我得到了错误的logact。的logcat的是这样的：IllegalArgumentException：宽度和高度必须> 0

09-22 16:41:02.081: D/dalvikvm(26969): Late-enabling CheckJNI 
09-22 16:41:02.191: D/ActivityThread(26969): setTargetHeapUtilization:0.25 
09-22 16:41:02.191: D/ActivityThread(26969): setTargetHeapIdealFree:8388608 
09-22 16:41:02.191: D/ActivityThread(26969): setTargetHeapConcurrentStart:2097152 
09-22 16:41:03.141: D/AndroidRuntime(26969): Shutting down VM 
09-22 16:41:03.141: W/dalvikvm(26969): threadid=1: thread exiting with uncaught exception (group=0x41bb5438) 
09-22 16:41:03.171: E/AndroidRuntime(26969): FATAL EXCEPTION: main 
09-22 16:41:03.171: E/AndroidRuntime(26969): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.prova1/com.example.prova1.MoveBalloon}: java.lang.IllegalArgumentException: width and height must be > 0 
09-22 16:41:03.171: E/AndroidRuntime(26969): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2114) 
09-22 16:41:03.171: E/AndroidRuntime(26969): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2139) 
09-22 16:41:03.171: E/AndroidRuntime(26969): at android.app.ActivityThread.access$700(ActivityThread.java:143) 
09-22 16:41:03.171: E/AndroidRuntime(26969): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1241) 
09-22 16:41:03.171: E/AndroidRuntime(26969): at android.os.Handler.dispatchMessage(Handler.java:99) 
09-22 16:41:03.171: E/AndroidRuntime(26969): at android.os.Looper.loop(Looper.java:137) 
09-22 16:41:03.171: E/AndroidRuntime(26969): at android.app.ActivityThread.main(ActivityThread.java:4963) 
09-22 16:41:03.171: E/AndroidRuntime(26969): at java.lang.reflect.Method.invokeNative(Native Method) 
09-22 16:41:03.171: E/AndroidRuntime(26969): at java.lang.reflect.Method.invoke(Method.java:511) 
09-22 16:41:03.171: E/AndroidRuntime(26969): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1038) 
09-22 16:41:03.171: E/AndroidRuntime(26969): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:805) 
09-22 16:41:03.171: E/AndroidRuntime(26969): at dalvik.system.NativeStart.main(Native Method) 
09-22 16:41:03.171: E/AndroidRuntime(26969): Caused by: java.lang.IllegalArgumentException: width and height must be > 0 
09-22 16:41:03.171: E/AndroidRuntime(26969): at android.graphics.Bitmap.createBitmap(Bitmap.java:667) 
09-22 16:41:03.171: E/AndroidRuntime(26969): at android.graphics.Bitmap.createBitmap(Bitmap.java:615) 
09-22 16:41:03.171: E/AndroidRuntime(26969): at com.example.prova1.MoveBalloon.getResizedBitmap(MoveBalloon.java:158) 
09-22 16:41:03.171: E/AndroidRuntime(26969): at com.example.prova1.MoveBalloon.onCreate(MoveBalloon.java:99) 
09-22 16:41:03.171: E/AndroidRuntime(26969): at android.app.Activity.performCreate(Activity.java:5184) 
09-22 16:41:03.171: E/AndroidRuntime(26969): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1094) 
09-22 16:41:03.171: E/AndroidRuntime(26969): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2078) 
09-22 16:41:03.171: E/AndroidRuntime(26969): ... 11 more 
09-22 16:41:16.471: I/Process(26969): Sending signal. PID: 26969 SIG: 9

其中错误occure的类是如下：

package com.example.prova1; 


import android.app.Activity; 
import android.content.Context; 
import android.graphics.Bitmap; 
import android.graphics.BitmapFactory; 
import android.graphics.Canvas; 
import android.graphics.Color; 
import android.graphics.Matrix; 
import android.graphics.Point; 

import android.hardware.SensorManager; 
import android.os.Build; 
import android.os.Bundle; 
import android.util.DisplayMetrics; 
import android.view.Display; 
import android.view.SurfaceHolder; 
import android.view.SurfaceView; 
import android.view.WindowManager; 

public class MoveBalloon extends Activity { 
    Bitmap balloon; 
    Bitmap background; 
    Bitmap _background; 
    DrawBalloon myView; 
    float x,y,sensorX, sensorY; 
    SensorManager sm; 
    Microphone mic; 
    int width, height; 




public class DrawBalloon extends SurfaceView implements Runnable { 

    SurfaceHolder ourHolder ; 
    Thread ourThread = null; 
    boolean isRunning=true; 

    public DrawBalloon(Context context) { 
     super(context); 
     ourHolder= getHolder(); 
    } 

    public void pause() { 
     isRunning=false; 
     while(true){ 
      try{ 
       ourThread.join(); 
      } catch (InterruptedException e){ 
       e.printStackTrace(); 
      } 
      break; 
     } 
     ourThread=null; 
    } 

    public void resume(){ 
     isRunning=true; 
     ourThread = new Thread(this); 
     ourThread.start(); 


    } 
    @Override 
    public void run(){ 
     while(isRunning){ 
      if(!ourHolder.getSurface().isValid()) 
       continue; 
      Canvas canvas = ourHolder.lockCanvas(); 

      updateMic(); 
      canvas.drawBitmap(background,0,0,null); 
      canvas.drawBitmap(balloon, sensorX, sensorY,null); 
      ourHolder.unlockCanvasAndPost(canvas); 
     } 
    } 
} 



@Override 
protected void onCreate(Bundle savedInstanceState) { 
    // TODO Auto-generated method stub 
    super.onCreate(savedInstanceState); 
    /*sm= (SensorManager) getSystemService(Context.SENSOR_SERVICE); 
    if(sm.getSensorList(Sensor.TYPE_ACCELEROMETER).size()!=0){ 
     Sensor s = sm.getSensorList(Sensor.TYPE_ACCELEROMETER).get(0); 
     sm.registerListener(this,s ,SensorManager.SENSOR_DELAY_NORMAL); 
    }*/ 
mic = new Microphone(); 
balloon = BitmapFactory.decodeResource(getResources(), R.drawable.images); 
background = BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher); 
sensorX=150; 
sensorY=350; 
//x=y=sensorX=sensorY=0; 
getSize(width,height); 
_background = getResizedBitmap(background,height,width); 
myView= new DrawBalloon (this); 
myView.resume(); 
setContentView(myView); 
} 



/*@Override 
public void onAccuracyChanged(Sensor sensor, int accuracy) { 
    // TODO Auto-generated method stub 

} 



@Override 
public void onSensorChanged(SensorEvent event) { 
    // TODO Auto-generated method stub 
    try { 
     Thread.sleep(20); 
    } catch (InterruptedException e) { 
     // TODO Auto-generated catch block 
     e.printStackTrace(); 
    } 
    sensorX=event.values[0]; 
    sensorY=event.values[1]; 

} 

*/ 
public void updateMic(){ 
int level = mic.getLevel(); 

    sensorY-=level; 
} 

@Override 
public void onBackPressed() { 


    finish(); 


    } 

public Bitmap getResizedBitmap(Bitmap bm, int newHeight, int newWidth) { 
    int width = bm.getWidth(); 
    int height = bm.getHeight(); 
    float scaleWidth = ((float) newWidth)/width; 
    float scaleHeight = ((float) newHeight)/height; 

    // Create a matrix for the manipulation 
    Matrix matrix = new Matrix(); 

    // Resize the bit map 
    matrix.postScale(scaleWidth, scaleHeight); 

    // Recreate the new Bitmap 
    Bitmap resizedBitmap = Bitmap.createBitmap(bm, 0, 0, width, height, matrix, false); 
    return resizedBitmap; 
} 

public void getSize(int x, int y){ 
WindowManager w = this.getWindowManager(); 
Display d = w.getDefaultDisplay(); 
DisplayMetrics metrics = new DisplayMetrics(); 
d.getMetrics(metrics); 
// since SDK_INT = 1; 
int widthPixels = metrics.widthPixels; 
int heightPixels = metrics.heightPixels; 

if (Build.VERSION.SDK_INT >= 14 && Build.VERSION.SDK_INT < 17){ 
try { 
    widthPixels = (Integer) Display.class.getMethod("getRawWidth").invoke(d); 
    heightPixels = (Integer) Display.class.getMethod("getRawHeight").invoke(d); 
} catch (Exception ignored) { 
} 
} 
// includes window decorations (statusbar bar/menu bar) 
if (Build.VERSION.SDK_INT >= 17){ 
try { 
    Point realSize = new Point(); 
    Display.class.getMethod("getRealSize", Point.class).invoke(d, realSize); 
    widthPixels = realSize.x; 
    heightPixels = realSize.y; 
} catch (Exception ignored) { 
} 
} 

x=widthPixels; 
y=heightPixels; 
} 
}

的行号99是：

_background = getResizedBitmap(background,height,width);

的行号158是：

Bitmap resizedBitmap = Bitmap.createBitmap(bm, 0, 0, width, height, matrix, false);

任何人都可以帮助我吗？谢谢！

来源

2013-09-22 user2766662

'_background = getResizedBitmap（background，height，width）;'你在哪里设置'width'和'height'？您发布了很多格式不正确的代码，因此难以阅读，我无法看到您设置的位置。 – Simon

宽度和高度都是int变量。我想使用getSize（width，height）方法在屏幕中存储屏幕的宽度和高度。然后我想使用getResizedBitmap（....）方法调整大小的位图。 – user2766662

如果你想获得设备的屏幕尺寸，然后做如下

Display display = getWindowManager().getDefaultDisplay(); 
Point size = new Point(); 
display.getSize(size); 
int width = size.x; 
int height = size.y;

，如果您使用的是API < 13然后使用

Display display = getWindowManager().getDefaultDisplay(); 
int width = display.getWidth(); // deprecated 
int height = display.getHeight();

然后在

使用这些值

_background = getResizedBitmap(background,height,width);

参考ScreenSize

来源

2013-09-22 15:27:40 Manishika

IllegalArgumentException：宽度和高度必须> 0

回答

相关问题