我的应用程序是一个启动器，我有问题要获得图标的大小，我试图使用图标列表并设置正确的大小。但对于具有xxhdpi的设备，我的应用程序很快。用于获取应用程序信息的类
import java.io.ByteArrayOutputStream;
import java.util.ArrayList;
import java.util.Formatter.BigDecimalLayoutForm;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import android.content.Context;
import android.content.res.Configuration;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.Bitmap.CompressFormat;
import android.graphics.Bitmap.Config;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PaintFlagsDrawFilter;
import android.graphics.PixelFormat;
import android.graphics.Rect;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.PaintDrawable;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.TextView;
/**
* Adapter used for providing the applications to show on the launcher's basic
* view.
*
*/
public class GridViewAppInfoAdapter extends BaseAdapter {
private Rect mOldBounds = new Rect();
private List<ApplicationInfo> apps;
private Context context;
private static final String TAG = "GridViewAppInfoAdapter";
private static int lowVal;
private static int medVal;
private static int highVal;
private static int xhighVal;
private static int xxhighVal;
public static ArrayList<String> lApplication = new ArrayList<String>();
public static ArrayList<String> AppList = new ArrayList<String>();
public GridViewAppInfoAdapter(Context context, List<ApplicationInfo> apps) {
super();
this.context = context;
this.apps = apps;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// Log.e("GridView", "getView");
final ApplicationInfo info = apps.get(position);
if (convertView == null) {
final LayoutInflater inflater = LayoutInflater.from(context);
convertView = inflater.inflate(R.layout.grid_item, parent, false);
}
Drawable icon = info.icon;
ImageView imageView = new ImageView(context);
if (!info.filtered) {
final Resources resources = context.getResources();
DisplayMetrics highmetrics = new DisplayMetrics();
highmetrics = resources.getDisplayMetrics();
int width = (int) resources
.getDimension(android.R.dimen.app_icon_size);
int height = (int) resources
.getDimension(android.R.dimen.app_icon_size);
final int iconWidth = icon.getIntrinsicWidth();
final int iconHeight = icon.getIntrinsicHeight();
if (icon instanceof PaintDrawable) {
PaintDrawable painter = (PaintDrawable) icon;
painter.setIntrinsicWidth(width);
painter.setIntrinsicHeight(height);
}
// if (width > 0 && height > 0
// && (width < iconWidth || height < iconHeight))
if (width > 0 && height > 0) {
final float ratio = (float) iconWidth / iconHeight;
if (iconWidth > iconHeight) {
height = (int) (width / ratio);
} else if (iconHeight > iconWidth) {
width = (int) (height * ratio);
}
if ((context.getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_XLARGE) {
lowVal = 65;
medVal = 90;
highaVal = 130;
xhighVal = 180;
xxhighVal = 280;
} else if ((context.getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_LARGE) {
lowVal = 36;
medVal = 48;
highVal = 72;
xhighVal = 96;
xxhighVal = 144;
} else if ((context.getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_NORMAL) {
lowVal = 36;
medVal = 48;
highVal = 130;
xhighVal = 173;
xxhighVal = 600;
} else if ((context.getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_SMALL) {
}
switch (highmetrics.densityDpi) {
case DisplayMetrics.DENSITY_LOW:
imageView.setLayoutParams(new GridView.LayoutParams(lowVal,
lowVal));
height = lowVal;
width = lowVal;
break;
case DisplayMetrics.DENSITY_MEDIUM:
imageView.setLayoutParams(new GridView.LayoutParams(medVal,
medVal));
height = medVal;
width = medVal;
break;
case DisplayMetrics.DENSITY_HIGH:
imageView.setLayoutParams(new GridView.LayoutParams(
highVal, highVal));
height = highVal;
width = highVal;
break;
case DisplayMetrics.DENSITY_XHIGH:
imageView.setLayoutParams(new GridView.LayoutParams(
xhighVal, xhighVal));
height = xhighVal;
width = xhighVal;
break;
case DisplayMetrics.DENSITY_XXHIGH:
imageView.setLayoutParams(new GridView.LayoutParams(
xxhighVal, xxhighVal));
height = xxhighVal;
width = xxhighVal;
break;
default:
break;
}
// System.gc();
final Bitmap.Config c = icon.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888
: Bitmap.Config.RGB_565;
Bitmap thumb;
try {
thumb = Bitmap.createBitmap(width, height, c);
} catch (Error e) {
thumb = Bitmap.createBitmap(width, height,
Bitmap.Config.ARGB_4444);
}
final Canvas canvas = new Canvas(thumb);
canvas.setDrawFilter(new PaintFlagsDrawFilter(
Paint.DITHER_FLAG, 0));
// Copy the old bounds to restore them later
// If we were to do oldBounds = icon.getBounds(),
// the call to setBounds() that follows would
// change the same instance and we would lose the
// old bounds
mOldBounds.set(icon.getBounds());
icon.setBounds(
context.getResources().getInteger(
R.integer.image_padding),
context.getResources().getInteger(
R.integer.image_padding), width, height);
icon.draw(canvas);
icon.setBounds(mOldBounds);
icon = info.icon = new BitmapDrawable(thumb);
info.filtered = true;
}
}
final TextView textView = (TextView) convertView
.findViewById(R.id.label);
textView.setCompoundDrawablesWithIntrinsicBounds(null, icon, null, null);
textView.setText(info.title);
textView.setLines(2);
lApplication.add((info.title).toString());
return convertView;
}
@Override
public int getCount() {
// supprime les répétitions
List apps2 = new ArrayList();
Set set = new HashSet();
for (Object item : apps) {
if (!set.contains(item)) {
apps2.add(item);
set.add(item);
}
}
// Log.e("apps", "/" + set.size());
return set.size();
}
@Override
public Object getItem(int position) {
return apps.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
public void setApps(List<ApplicationInfo> apps) {
this.apps = apps;
for (int i = 0; i < apps.size(); i++) {
AppList.add(apps.get(i).title.toString());
}
notifyDataSetChanged();
}
public ArrayList<String> getApplicationList() {
ArrayList<String> AppList = new ArrayList<String>();
for (int i = 0; i < apps.size(); i++) {
AppList.add(apps.get(i).title.toString());
}
return AppList;
}
}
我有一个关于XXHDPI内存的问题，日志在下面给出
4
: E/AndroidRuntime(11857): FATAL EXCEPTION: main
07-15 18:32:40.124: E/AndroidRuntime(11857): java.lang.OutOfMemoryError
07-15 18:32:40.124: E/AndroidRuntime(11857): at android.graphics.Bitmap.nativeCreate(Native Method)
07-15 18:32:40.124: E/AndroidRuntime(11857): at android.graphics.Bitmap.createBitmap(Bitmap.java:718)
07-15 18:32:40.124: E/AndroidRuntime(11857): a
我不知道该怎么做。
答案 0 :(得分：0)
请回收您的位图，请使用以下链接。它将阻止您的应用程序崩溃。 http://developer.android.com/training/displaying-bitmaps/index.html
答案 1 :(得分：0)
替换
thumb = Bitmap.createBitmap（width，height，c）;
到
thumb = Bitmap.createScaledBitmap（yourSelectedImage，h，w，true）; 并检查。