im在GridView中的SD卡上显示特定文件夹中的图像，直到知道一切正常，所有图像都显示在gridview上，但是当我改变屏幕的方向时，它会崩溃。下面是我的代码和崩溃日志：
import java.io.File;
import android.content.Context;
import android.net.Uri;
import android.os.Environment;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
public class ImageAdapter extends BaseAdapter {
private Context mContext;
File root = new File(Environment.getExternalStorageDirectory()
+ File.separator + "MYPICS" + File.separator);
private File[] fileName = root.listFiles();
int count=fileName.length;
public ImageAdapter(Context c) {
mContext = c;
}
public int getCount() {
return fileName.length;
}
public Object getItem(int position) {
return null;
}
public long getItemId(int position) {
return 0;
}
// create a new ImageView for each item referenced by the Adapter
public View getView(int position, View convertView, ViewGroup parent) {
Uri uri = Uri.fromFile(fileName[position]);
ImageView imageView;
if (convertView == null) { // if it's not recycled, initialize some attributes
imageView = new ImageView(mContext);
imageView.setLayoutParams(new GridView.LayoutParams(85, 85));
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setPadding(8, 8, 8, 8);
} else {
imageView = (ImageView) convertView;
}
imageView.setImageURI(uri);
return imageView;
}
}
我收到内存错误，下面是我的Logcat：
05-16 16:18:31.218: E/AndroidRuntime(26907): java.lang.OutOfMemoryError: bitmap size exceeds VM budget
05-16 16:18:31.218: E/AndroidRuntime(26907): at android.graphics.BitmapFactory.nativeDecodeStream(Native Method)
05-16 16:18:31.218: E/AndroidRuntime(26907): at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:573)
05-16 16:18:31.218: E/AndroidRuntime(26907): at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:439)
05-16 16:18:31.218: E/AndroidRuntime(26907): at android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:697)
05-16 16:18:31.218: E/AndroidRuntime(26907): at android.graphics.drawable.Drawable.createFromStream(Drawable.java:657)
05-16 16:18:31.218: E/AndroidRuntime(26907): at android.widget.ImageView.resolveUri(ImageView.java:521)
05-16 16:18:31.218: E/AndroidRuntime(26907): at android.widget.ImageView.setImageURI(ImageView.java:305)
05-16 16:18:31.218: E/AndroidRuntime(26907): at com.sachin.imagegrideview.ImageAdapter.getView(ImageAdapter.java:53)
05-16 16:18:31.218: E/AndroidRuntime(26907): at android.widget.AbsListView.obtainView(AbsListView.java:1464)
05-16 16:18:31.218: E/AndroidRuntime(26907): at android.widget.GridView.onMeasure(GridView.java:935)
05-16 16:18:31.218: E/AndroidRuntime(26907): at android.view.View.measure(View.java:8313)
05-16 16:18:31.218: E/AndroidRuntime(26907): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138)
05-16 16:18:31.218: E/AndroidRuntime(26907): at android.widget.FrameLayout.onMeasure(FrameLayout.java:250)
05-16 16:18:31.218: E/AndroidRuntime(26907): at android.view.View.measure(View.java:8313)
05-16 16:18:31.218: E/AndroidRuntime(26907): at android.widget.LinearLayout.measureVertical(LinearLayout.java:531)
05-16 16:18:31.218: E/AndroidRuntime(26907): at android.widget.LinearLayout.onMeasure(LinearLayout.java:309)
05-16 16:18:31.218: E/AndroidRuntime(26907): at android.view.View.measure(View.java:8313)
05-16 16:18:31.218: E/AndroidRuntime(26907): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138)
05-16 16:18:31.218: E/AndroidRuntime(26907): at android.widget.FrameLayout.onMeasure(FrameLayout.java:250)
05-16 16:18:31.218: E/AndroidRuntime(26907): at android.view.View.measure(View.java:8313)
05-16 16:18:31.218: E/AndroidRuntime(26907): at android.view.ViewRoot.performTraversals(ViewRoot.java:845)
05-16 16:18:31.218: E/AndroidRuntime(26907): at android.view.ViewRoot.handleMessage(ViewRoot.java:1865)
05-16 16:18:31.218: E/AndroidRuntime(26907): at android.os.Handler.dispatchMessage(Handler.java:99)
05-16 16:18:31.218: E/AndroidRuntime(26907): at android.os.Looper.loop(Looper.java:130)
05-16 16:18:31.218: E/AndroidRuntime(26907): at android.app.ActivityThread.main(ActivityThread.java:3687)
05-16 16:18:31.218: E/AndroidRuntime(26907): at java.lang.reflect.Method.invokeNative(Native Method)
05-16 16:18:31.218: E/AndroidRuntime(26907): at java.lang.reflect.Method.invoke(Method.java:507)
05-16 16:18:31.218: E/AndroidRuntime(26907): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
05-16 16:18:31.218: E/AndroidRuntime(26907): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
05-16 16:18:31.218: E/AndroidRuntime(26907): at dalvik.system.NativeStart.main(Native Method)
答案 0 :(得分：4)
将此添加到列表视图活动的清单
android:configChanges="orientation|keyboardHidden"
如果这没有帮助，那么为图像文件添加这段代码来采样位图
private Bitmap decodeFile(File f){
FileOutputStream os = null;
try {
//Decode image size
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
FileInputStream fis = new FileInputStream(f);
BitmapFactory.decodeStream(fis, null, o);
fis.close();
int scale = 1;
if (o.outHeight > IMAGE_MAX_SIZE || o.outWidth > IMAGE_MAX_SIZE) {
scale = (int)Math.pow(2, (int) Math.round(Math.log(IMAGE_MAX_SIZE / (double) Math.max(o.outHeight, o.outWidth)) / Math.log(0.5)));
}
//Decode with inSampleSize
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inSampleSize = scale;
fis = new FileInputStream(f);
try {
b = BitmapFactory.decodeStream(fis, null, o2);
} catch (OutOfMemoryError e) {
Log.d("hai","filename"+f);
System.gc();
}
fis.close();
} catch (IOException e) {
}
return b;
}
加载很多图像导致应用内存耗尽并强行关闭。我认为这是你的应用程序发生的事情。内存问题是android在开发应用程序时的一个复杂问题。这可以通过手动清除未使用的位图和使用垃圾收集器。
尝试使用System.gc（）;
尝试使用
回收位图Bitmap.recycle（）;
使所有未使用的位图为空。
释放所有未使用的内存。
答案 1 :(得分：1)
<强> <activity android:configChanges="keyboardHidden|orientation"></activity>
编辑您的活动代码并尝试