使用2个简单的活动。第一个活动仅包含一个按钮,用于启动第二个活动,该活动包含地图:
主要活动:
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void goToMap(View view){ //This is just the onClick method for the button
Intent intent=new Intent( this, BigMapTest.class);
startActivity(intent);
}
地图活动:public class BigMapTest extends FragmentActivity {
SupportMapFragment mapFragment;
GoogleMap map;
@Override
protected void onCreate(Bundle arg0) {
// TODO Auto-generated method stub
super.onCreate(arg0);
setContentView(R.layout.travel_diary_big_map);
mapFragment=(SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.big_map);
map=mapFragment.getMap();
}
地图活动的XML布局:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<fragment
android:id="@+id/big_map"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
class="com.google.android.gms.maps.SupportMapFragment"
/>
现在,当我运行这段代码时,按下按钮移到带有地图的Activity,然后按返回键回到第一个Activity...然后重复这个过程,我可以看到堆大小每次都在增加,直到达到极限,然后它开始卡顿。如果继续使用地图(例如缩放),此时可能会出现OOM异常。
01-25 16:10:13.931: D/dalvikvm(21578): GC_FOR_ALLOC freed 1898K, 7% free 45859K/49187K, paused 204ms
01-25 16:10:14.671: I/dalvikvm-heap(21578): Clamp target GC heap from 52.724MB to 48.000MB
01-25 16:10:14.671: D/dalvikvm(21578): GC_CONCURRENT freed 2534K, 6% free 46554K/49187K, paused 3ms+14ms
01-25 16:10:15.372: I/dalvikvm-heap(21578): Clamp target GC heap from 52.979MB to 48.000MB
01-25 16:10:15.382: D/dalvikvm(21578): GC_CONCURRENT freed 2273K, 5% free 46815K/49187K, paused 3ms+15ms
01-25 16:10:15.622: I/dalvikvm-heap(21578): Clamp target GC heap from 52.604MB to 48.000MB
01-25 16:10:15.622: D/dalvikvm(21578): GC_FOR_ALLOC freed 657K, 6% free 46431K/49187K, paused 202ms
01-25 16:10:16.203: I/dalvikvm-heap(21578): Clamp target GC heap from 52.959MB to 48.000MB
01-25 16:10:16.203: D/dalvikvm(21578): GC_FOR_ALLOC freed 1469K, 5% free 46796K/49187K, paused 217ms
01-25 16:10:16.203: I/dalvikvm-heap(21578): Forcing collection of SoftReferences for 278744-byte allocation
01-25 16:10:16.423: I/dalvikvm-heap(21578): Clamp target GC heap from 52.952MB to 48.000MB
01-25 16:10:16.423: D/dalvikvm(21578): GC_BEFORE_OOM freed 9K, 5% free 46786K/49187K, paused 219ms
01-25 16:10:16.423: E/dalvikvm-heap(21578): Out of memory on a 278744-byte allocation.
欢迎任何建议/帮助。