Android 如何使用ActivityManager.setWatchHeapLimit()监视堆限制
根据官方文件: 我写了一个演示,看看是否会触发HEAP_限制。但它似乎不起作用,下面是我的代码Android 如何使用ActivityManager.setWatchHeapLimit()监视堆限制,android,activity-manager,Android,Activity Manager,根据官方文件: 我写了一个演示,看看是否会触发HEAP_限制。但它似乎不起作用,下面是我的代码 public class ActivityManagerActivity extends Activity { private String TAG = this.getClass().getName(); private Button btnIncreaseMemory; private BroadcastReceiver receiver; @Overrid
public class ActivityManagerActivity extends Activity
{
private String TAG = this.getClass().getName();
private Button btnIncreaseMemory;
private BroadcastReceiver receiver;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_activity_manager);
registerBroadcast();
registerHeapLimit();
iniComponent();
}
private void iniComponent()
{
btnIncreaseMemory = (Button) findViewById(R.id.btnIncreaseMemory);
btnIncreaseMemory.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View view)
{
Bitmap bitmap = ((BitmapDrawable) getDrawable(R.mipmap.image)).getBitmap();
Log.e(TAG, "bitmap size:" + bitmap.getByteCount());
((ImageView) findViewById(R.id.ivBitmap)).setImageBitmap(bitmap);
}
});
}
@Override
public void onDestroy()
{
super.onDestroy();
ActivityManager activityManager = (ActivityManager) getSystemService(ACTIVITY_SERVICE);
activityManager.clearWatchHeapLimit();
if (receiver != null)
{
unregisterReceiver(receiver);
receiver = null;
}
}
private void registerHeapLimit()
{
ActivityManager activityManager = (ActivityManager) getSystemService(ACTIVITY_SERVICE);
activityManager.setWatchHeapLimit(2);
}
private void registerBroadcast()
{
IntentFilter filter = new IntentFilter();
filter.addAction("ACTION_REPORT_HEAP_LIMIT");
receiver = new BroadcastReceiver()
{
@Override
public void onReceive(Context context, Intent intent)
{
// not be called
Toast.makeText(ActivityManagerActivity.this, "get msg", Toast.LENGTH_SHORT).show();
}
};
registerReceiver(receiver, filter);
}
}
我将代码更改为:
public class ActivityManagerActivity extends Activity
{
private String TAG = this.getClass().getName();
private Button btnIncreaseMemory;
private BroadcastReceiver receiver;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_activity_manager);
registerBroadcast();
registerHeapLimit();
iniComponent();
}
int index = 0;
private void iniComponent()
{
btnIncreaseMemory = (Button) findViewById(R.id.btnIncreaseMemory);
btnIncreaseMemory.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View view)
{
if(index == 0)
{
Bitmap bitmap = ((BitmapDrawable) getDrawable(R.mipmap.img6802)).getBitmap();
Log.e(TAG, "bitmap1 size:" + bitmap.getByteCount());
((ImageView) findViewById(R.id.ivBitmap)).setImageBitmap(bitmap);
index = 1;
}
else if(index == 1)
{
Bitmap bitmap = ((BitmapDrawable) getDrawable(R.mipmap.img6803)).getBitmap();
Log.e(TAG, "bitmap2 size:" + bitmap.getByteCount());
((ImageView) findViewById(R.id.ivBitmap2)).setImageBitmap(bitmap);
index = 2;
}
else if(index == 2)
{
Bitmap bitmap = ((BitmapDrawable) getDrawable(R.mipmap.img6804)).getBitmap();
Log.e(TAG, "bitmap3 size:" + bitmap.getByteCount());
((ImageView) findViewById(R.id.ivBitmap3)).setImageBitmap(bitmap);
index = 3;
}
}
});
}
@Override
public void onDestroy()
{
super.onDestroy();
ActivityManager activityManager = (ActivityManager) getSystemService(ACTIVITY_SERVICE);
activityManager.clearWatchHeapLimit();
if (receiver != null)
{
unregisterReceiver(receiver);
receiver = null;
}
}
private void registerHeapLimit()
{
ActivityManager activityManager = (ActivityManager) getSystemService(ACTIVITY_SERVICE);
activityManager.setWatchHeapLimit(157286400);//150MB
}
private void registerBroadcast()
{
IntentFilter filter = new IntentFilter();
filter.addAction("ACTION_REPORT_HEAP_LIMIT");
receiver = new BroadcastReceiver()
{
@Override
public void onReceive(Context context, Intent intent)
{
// not be called
Toast.makeText(ActivityManagerActivity.this, "get msg", Toast.LENGTH_SHORT).show();
}
};
registerReceiver(receiver, filter);
}
}
但是仍然没有通知,甚至使用的堆也超过了我设置的150MB限制。将pss限制增加到一个合理的值,单击按钮时将跨越该值
您提供的值(2k)太小,我相信您的活动甚至在单击按钮之前就已经超过了该值。将pss限制提高到合理的值,单击按钮时将跨越该值
您提供的值(2k)太小,我相信您的活动在单击按钮之前就已经超过了该值。您是否在调试模式下构建了apk?@HasifSeyd Hi,我不确定,但我认为默认模式可能是调试模式。因为我使用的是AS和android:debuggable=“true”在manifest.xml中不需要。是否在调试模式下构建apk?@HasifSeyd嗨,我不确定,但我认为默认模式可能是调试模式。因为我使用的是AS,而manifest.xml中不需要android:debuggable=“true”。