Question

我创建了一个Gallery，如下所示：

MainActivity：

public class MainActivity extends Activity {
    Gallery gallery;
    ImageView imageView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        gallery = (Gallery) findViewById(R.id.gallery1);
        imageView = (ImageView) findViewById(R.id.imageView1);
        gallery.setAdapter(new ImageAdapter(this));


    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
}

ImageAdapter.java：

    public class ImageAdapter extends BaseAdapter {

    private Context context;

    public ImageAdapter(Context context) {
        // TODO Auto-generated constructor stub
        this.context = context;
    }

    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        return thumbsIds.length;
    }

    @Override
    public Object getItem(int position) {
        // TODO Auto-generated method stub
        return position;
    }

    @Override
    public long getItemId(int position) {
        // TODO Auto-generated method stub
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        // TODO Auto-generated method stub
        ImageView imageView = null;
        if (convertView == null) {
            imageView = new ImageView(context);
            imageView.setLayoutParams(new Gallery.LayoutParams(115, 100));
        } else {
            imageView = (ImageView) convertView;
        }

        imageView.setImageResource(thumbsIds[position]);
        return imageView;
    }

    public Integer[] thumbsIds = {
            R.drawable.a,
            R.drawable.b,
            R.drawable.c,
            R.drawable.d
    };
}

和activity_main.xml：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <Gallery
        android:id="@+id/gallery1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/ic_launcher" />

</LinearLayout>

但是当我启动我的模拟器时，我收到了这个例外：

10-18 13:32:28.107: E/AndroidRuntime(715): FATAL EXCEPTION: main
10-18 13:32:28.107: E/AndroidRuntime(715): java.lang.OutOfMemoryError
10-18 13:32:28.107: E/AndroidRuntime(715):  at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method)
10-18 13:32:28.107: E/AndroidRuntime(715):  at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:483)
10-18 13:32:28.107: E/AndroidRuntime(715):  at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:351)
10-18 13:32:28.107: E/AndroidRuntime(715):  at android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:773)
10-18 13:32:28.107: E/AndroidRuntime(715):  at android.content.res.Resources.loadDrawable(Resources.java:1937)
10-18 13:32:28.107: E/AndroidRuntime(715):  at android.content.res.Resources.getDrawable(Resources.java:664)
10-18 13:32:28.107: E/AndroidRuntime(715):  at android.widget.ImageView.resolveUri(ImageView.java:542)
10-18 13:32:28.107: E/AndroidRuntime(715):  at android.widget.ImageView.setImageResource(ImageView.java:315)
10-18 13:32:28.107: E/AndroidRuntime(715):  at com.example.gallerydemo.ImageAdapter.getView(ImageAdapter.java:46)
10-18 13:32:28.107: E/AndroidRuntime(715):  at android.widget.Gallery.makeAndAddView(Gallery.java:844)
10-18 13:32:28.107: E/AndroidRuntime(715):  at android.widget.Gallery.fillToGalleryRightLtr(Gallery.java:798)
10-18 13:32:28.107: E/AndroidRuntime(715):  at android.widget.Gallery.fillToGalleryRight(Gallery.java:742)
10-18 13:32:28.107: E/AndroidRuntime(715):  at android.widget.Gallery.layout(Gallery.java:651)
10-18 13:32:28.107: E/AndroidRuntime(715):  at android.widget.Gallery.onLayout(Gallery.java:346)
10-18 13:32:28.107: E/AndroidRuntime(715):  at android.view.View.layout(View.java:11180)
10-18 13:32:28.107: E/AndroidRuntime(715):  at android.view.ViewGroup.layout(ViewGroup.java:4203)
10-18 13:32:28.107: E/AndroidRuntime(715):  at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1628)
10-18 13:32:28.107: E/AndroidRuntime(715):  at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1486)
10-18 13:32:28.107: E/AndroidRuntime(715):  at android.widget.LinearLayout.onLayout(LinearLayout.java:1399)
10-18 13:32:28.107: E/AndroidRuntime(715):  at android.view.View.layout(View.java:11180)
10-18 13:32:28.107: E/AndroidRuntime(715):  at android.view.ViewGroup.layout(ViewGroup.java:4203)
10-18 13:32:28.107: E/AndroidRuntime(715):  at android.widget.FrameLayout.onLayout(FrameLayout.java:431)
10-18 13:32:28.107: E/AndroidRuntime(715):  at android.view.View.layout(View.java:11180)
10-18 13:32:28.107: E/AndroidRuntime(715):  at android.view.ViewGroup.layout(ViewGroup.java:4203)
10-18 13:32:28.107: E/AndroidRuntime(715):  at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1628)
10-18 13:32:28.107: E/AndroidRuntime(715):  at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1486)
10-18 13:32:28.107: E/AndroidRuntime(715):  at android.widget.LinearLayout.onLayout(LinearLayout.java:1399)
10-18 13:32:28.107: E/AndroidRuntime(715):  at android.view.View.layout(View.java:11180)
10-18 13:32:28.107: E/AndroidRuntime(715):  at android.view.ViewGroup.layout(ViewGroup.java:4203)
10-18 13:32:28.107: E/AndroidRuntime(715):  at android.widget.FrameLayout.onLayout(FrameLayout.java:431)
10-18 13:32:28.107: E/AndroidRuntime(715):  at android.view.View.layout(View.java:11180)
10-18 13:32:28.107: E/AndroidRuntime(715):  at android.view.ViewGroup.layout(ViewGroup.java:4203)
10-18 13:32:28.107: E/AndroidRuntime(715):  at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1468)
10-18 13:32:28.107: E/AndroidRuntime(715):  at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2418)
10-18 13:32:28.107: E/AndroidRuntime(715):  at android.os.Handler.dispatchMessage(Handler.java:99)
10-18 13:32:28.107: E/AndroidRuntime(715):  at android.os.Looper.loop(Looper.java:137)
10-18 13:32:28.107: E/AndroidRuntime(715):  at android.app.ActivityThread.main(ActivityThread.java:4340)
10-18 13:32:28.107: E/AndroidRuntime(715):  at java.lang.reflect.Method.invokeNative(Native Method)
10-18 13:32:28.107: E/AndroidRuntime(715):  at java.lang.reflect.Method.invoke(Method.java:511)
10-18 13:32:28.107: E/AndroidRuntime(715):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
10-18 13:32:28.107: E/AndroidRuntime(715):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
10-18 13:32:28.107: E/AndroidRuntime(715):  at dalvik.system.NativeStart.main(Native Method)

应用不会自行启动。它会立即崩溃。

Answer 1

此链接可以使用Asynctask帮助并在单独的线程中加载图像以实现平滑滚动。 http://developer.android.com/training/displaying-bitmaps/load-bitmap.html

加载GalleryView时出现OutOfMemory错误

1 个答案: