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我越來越Android是試圖使用再生圖像
帆布：試圖使用回收的位圖 [email protected]
每次我試圖展現一個圖片。 Image
當我刪除bmp.recycle（）一切順利，但我不這樣我不明白問題出在哪裏使用這個形象在我的代碼。
package com.example.photobooth;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import android.os.Bundle;
import android.os.Environment;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Rect;
import android.util.DisplayMetrics;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.view.Window;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.ImageView;
public class EditorActivity extends Activity implements OnClickListener{
String path = null;
private int screen_height;
private int screen_width;
private Bitmap setUpImage(Bitmap image) {
int min_side = Math.min(screen_height, screen_width);
float scale_factor = (float) (((float) min_side/image.getWidth()) * 1.5);
float[] scalef = { scale_factor, scale_factor };
Bitmap scaled_image = ImageUtilities.scaleImage(image, scalef);
return scaled_image;
}
private void setUp() {
Bundle b = getIntent().getExtras();
if (b != null) {
path = b.getString("path");
}
DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
this.screen_height = metrics.heightPixels;
this.screen_width = metrics.widthPixels;
int min_measure = Math.min(screen_width, screen_height);
// Make ImageView square
ImageView img = (ImageView) findViewById(R.id.photo_holder);
android.view.ViewGroup.LayoutParams lp = img.getLayoutParams();
lp.height = min_measure;
img.setLayoutParams(lp);
Bitmap bmp = BitmapFactory.decodeFile(path);
final Bitmap ready_image = setUpImage(bmp);
bmp.recycle();
ImageView iv = (ImageView) findViewById(R.id.photo_holder);
iv.setImageBitmap(ready_image);
// set up touch event for imageview(photo_holder)
img.setOnTouchListener(new OnTouchListener() {
float touch_x, touch_y, scrolled_x = 0.0f, scrolled_y = 0.0f;
public boolean onTouch(View v, MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
touch_x = event.getX();
touch_y = event.getY();
break;
case MotionEvent.ACTION_MOVE:
float cur_x = event.getX();
float cur_y = event.getY();
float scroll_x = -cur_x + touch_x;
float scroll_y = -cur_y + touch_y;
scrolled_x += scroll_x;
scrolled_y += scroll_y;
if (scrolled_x > (ready_image.getWidth() - screen_width)/2
|| scrolled_x < -(ready_image.getWidth() - screen_width)/2){
scrolled_x -= scroll_x;
scroll_x = 0;
}
if (scrolled_y > (ready_image.getHeight() - screen_width)/2
|| scrolled_y < -(ready_image.getHeight() - screen_width)/2){
scrolled_y -= scroll_y;
scroll_y = 0;
}
v.scrollBy((int) (scroll_x),
(int) (scroll_y));
touch_x = cur_x;
touch_y = cur_y;
break;
}
return true;
}
});
//Set up buttons
Button btn = (Button)findViewById(R.id.save);
btn.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
ImageView img = (ImageView)findViewById(R.id.photo_holder);
int scroll_x = img.getScrollX();
int scroll_y = img.getScrollY();
int left = (ready_image.getWidth() - screen_width)/2
+ scroll_x;
int top = (ready_image.getHeight() - screen_width)/2
+ scroll_y;
int right = left + screen_width;
int bottom = top + screen_width;
Rect r = new Rect(left, top, right, bottom);
Bitmap croped_image = ImageUtilities.cropImage(ready_image,
r,
screen_width,
screen_width);
String path_to_folder = Environment.getExternalStorageDirectory()
.getAbsolutePath();
String pic_path = path_to_folder + File.separator + MainActivity.app_name;
File f = new File(pic_path);
File picture = null;
try {
picture = File.createTempFile("photo_", ".jpg", f);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
FileOutputStream fos = new FileOutputStream(picture);
croped_image.compress(Bitmap.CompressFormat.JPEG, 100, fos);
fos.close();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (requestWindowFeature(Window.FEATURE_NO_TITLE))
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_editor);
setUp();
}
public void onClick(View v) {
// TODO Auto-generated method stub
}
}
bmp在setUp（）方法中被回收。
ImageUtility是
package com.example.photobooth;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.PorterDuff.Mode;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.RectF;
public class ImageUtilities {
public static Bitmap getRoundedCornerBitmap(Context context, Bitmap input,
int pixels, int w, int h, boolean squareTL, boolean squareTR,
boolean squareBL, boolean squareBR, boolean border) {
Bitmap output = Bitmap.createBitmap(w, h, Config.ARGB_8888);
Canvas canvas = new Canvas(output);
final float densityMultiplier = context.getResources()
.getDisplayMetrics().density;
final int color = 0xff424242;
final Paint paint = new Paint();
final Rect rect = new Rect(0, 0, w, h);
final RectF rectF = new RectF(rect);
// make sure that our rounded corner is scaled appropriately
final float roundPx = pixels * densityMultiplier;
paint.setAntiAlias(true);
canvas.drawARGB(0, 0, 0, 0);
paint.setColor(color);
canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
// draw rectangles over the corners we want to be square
if (squareTL) {
canvas.drawRect(0, 0, w/2, h/2, paint);
}
if (squareTR) {
canvas.drawRect(w/2, 0, w, h/2, paint);
}
if (squareBL) {
canvas.drawRect(0, h/2, w/2, h, paint);
}
if (squareBR) {
canvas.drawRect(w/2, h/2, w, h, paint);
}
paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
canvas.drawBitmap(input, 0, 0, paint);
if (border) {
paint.setStyle(Paint.Style.STROKE);
paint.setColor(Color.WHITE);
paint.setStrokeWidth(3);
canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
}
return output;
}
public static Bitmap cropImage(Bitmap origina_bmp, Rect rec, int w, int h) {
Bitmap target_bitmap = Bitmap.createBitmap(w, h,
Bitmap.Config.ARGB_8888);
target_bitmap.setDensity(origina_bmp.getDensity());
Canvas canvas = new Canvas(target_bitmap);
canvas.drawBitmap(origina_bmp, new Rect(rec.left, rec.top, rec.right,
rec.bottom), new Rect(0, 0, w, h), null);
return target_bitmap;
}
public static Bitmap makeSquareImage(Bitmap original_image, int size){
int min_side = Math.min(original_image.getWidth(),
original_image.getHeight());
int side_size = ImageUtilities.get2del(min_side);
int crop_to;
Bitmap croped_image = null;
if (min_side == original_image.getWidth()){
crop_to = (original_image.getHeight() - side_size)/2;
croped_image = ImageUtilities.cropImage(original_image, new Rect(
0, crop_to, original_image.getWidth(),
original_image.getHeight() - crop_to), size, size);
}else{
crop_to = (original_image.getWidth() - side_size)/2;
croped_image = ImageUtilities.cropImage(original_image, new Rect(
crop_to, 0, original_image.getWidth() - crop_to,
original_image.getHeight()), size, size);
}
return croped_image;
}
public static int get2del(int num) {
while (num % 2 != 0)
num++;
return num;
}
public static Bitmap scaleImage(Bitmap originalBMP, float[] scaleFactor) {
Matrix scaleMat = new Matrix();
scaleMat.postScale(scaleFactor[0], scaleFactor[1]);
Bitmap scaledImage = Bitmap.createBitmap(originalBMP, 0, 0,
originalBMP.getWidth(), originalBMP.getHeight(), scaleMat,
false);
return scaledImage;
}
}
所以也沒有。 如果我寫bmp = null而不是bmp.recycle（）一切正常，但我想知道爲什麼在第二次機會應用程序崩潰。