照抄照搬也能出問題，java.lang.OutOfMemoryError
阿新 • • 發佈：2019-01-22
照抄照搬書本上的ImageSwitcher程式，程式碼如下
package com.example.major.imageswitchertest; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.view.ViewGroup.LayoutParams; importandroid.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.AdapterView.OnItemSelectedListener; import android.widget.ViewSwitcher.ViewFactory; import android.widget.GridView; import android.widget.ImageSwitcher; import android.widget.ImageView; import android.widget.SimpleAdapter; public classMainActivity extends Activity { int[] imageIds=new int[] { R.drawable.pic1, R.drawable.pic2, R.drawable.pic3, R.drawable.pic4, R.drawable.pic5, R.drawable.pic6, R.drawable.pic7, R.drawable.pic8, R.drawable.pic9, R.drawable.pic10, R.drawable.pic11, R.drawable.pic12}; ImageSwitcher switcher; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); List<Map<String, Object>> listItems=new ArrayList<Map<String, Object>>(); for(int i=0;i<imageIds.length;i++) { Map<String, Object> listItem=new HashMap<String, Object>(); listItem.put("image",imageIds[i]); listItems.add(listItem); } switcher=(ImageSwitcher)findViewById(R.id.switcher); switcher.setFactory(new ViewFactory() { @Override public View makeView() { ImageView imageView=new ImageView(MainActivity.this); imageView.setScaleType(ImageView .ScaleType.FIT_CENTER); imageView.setLayoutParams(new ImageSwitcher.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT)); return imageView; } }); SimpleAdapter simpleAdapter=new SimpleAdapter(this,listItems,R.layout.cell,new String[]{"image"},new int[]{R.id.image1}); GridView grid=(GridView)findViewById(R.id.grid01); grid.setAdapter(simpleAdapter); grid.setOnItemSelectedListener(new OnItemSelectedListener() { @Override public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { switcher.setImageResource(imageIds[position]); } @Override public void onNothingSelected(AdapterView<?> parent) { } }); grid.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { switcher.setImageResource(imageIds[position]); } }); } }
執行時卻報錯如下：
E/AndroidRuntime﹕ FATAL EXCEPTION: main Process: com.example.major.imageswitchertest, PID: 9257 java.lang.OutOfMemoryError: Failed to allocate a 18662412 byte allocation with 2884280 free bytes and 2MB until OOM at dalvik.system.VMRuntime.newNonMovableArray(Native Method) at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method) at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:609) at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:444) at android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:988) at android.content.res.Resources.loadDrawableForCookie(Resources.java:2474) at android.content.res.Resources.loadDrawable(Resources.java:2381) at android.content.res.Resources.getDrawable(Resources.java:787) at android.content.Context.getDrawable(Context.java:403) at android.widget.ImageView.resolveUri(ImageView.java:747) at android.widget.ImageView.setImageResource(ImageView.java:398) at android.widget.SimpleAdapter.setViewImage(SimpleAdapter.java:240) at android.widget.SimpleAdapter.bindView(SimpleAdapter.java:190) at android.widget.SimpleAdapter.createViewFromResource(SimpleAdapter.java:126) at android.widget.SimpleAdapter.getView(SimpleAdapter.java:114) at android.widget.AbsListView.obtainView(AbsListView.java:2347) at android.widget.GridView.makeAndAddView(GridView.java:1433) at android.widget.GridView.makeRow(GridView.java:361) at android.widget.GridView.fillDown(GridView.java:302) at android.widget.GridView.fillFromTop(GridView.java:437) at android.widget.GridView.layoutChildren(GridView.java:1298) at android.widget.AbsListView.onLayout(AbsListView.java:2151) at android.view.View.layout(View.java:15671) at android.view.ViewGroup.layout(ViewGroup.java:5038) at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703) at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1557) at android.widget.LinearLayout.onLayout(LinearLayout.java:1466) at android.view.View.layout(View.java:15671) at android.view.ViewGroup.layout(ViewGroup.java:5038) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579) at android.widget.FrameLayout.onLayout(FrameLayout.java:514) at android.view.View.layout(View.java:15671) at android.view.ViewGroup.layout(ViewGroup.java:5038) at com.android.internal.widget.ActionBarOverlayLayout.onLayout(ActionBarOverlayLayout.java:494) at android.view.View.layout(View.java:15671) at android.view.ViewGroup.layout(ViewGroup.java:5038) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579) at android.widget.FrameLayout.onLayout(FrameLayout.java:514) at android.view.View.layout(View.java:15671) at android.view.ViewGroup.layout(ViewGroup.java:5038) at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2086) at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1843) at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1061) at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5885) at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767) at android.view.Choreographer.doCallbacks(Choreographer.java:580) at android.view.Choreographer.doFrame(Choreographer.java:550) at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753) at android.os.Handler.handleCallback(Handler.java:739) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:135) at android.app.ActivityThread.main(ActivityThread.java:5254) at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
糾結了中午找不到原因，各種查各種問不得姐，沒辦法，試了試把drawable中的圖片放入drawable-xxhdpi
結果。。。。。居然沒問題了，這就是傳說中的低階錯誤吧。