1
我正在使用Google's Hello GridView Tutorial瞭解如何使用GridView。它與Drawable正常工作，我可以將許多項目添加到GridView。在運行應用程序時，我可以滾動並旋轉手機。GridView + ImageView + rotate =意外停止？
但是，如果我從SD卡使用圖像或照片的事情出錯了。我可以顯示Activity用縮略圖，與Drawable，但是當我旋轉手機，我得到的消息：
應用程序意外終止。
有人能幫助我嗎？
清單：
<uses-sdk android:minSdkVersion="7" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" >
</uses-permission>
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:name=".TestActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
佈局：
<TextView
android:id="@+id/txt"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView" />
<GridView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/gridview"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:columnWidth="90dp"
android:gravity="center"
android:horizontalSpacing="10dp"
android:numColumns="auto_fit"
android:stretchMode="columnWidth"
android:verticalSpacing="10dp" />
</LinearLayout>
活性： 包test.test;
import java.io.File;
import android.app.Activity;
import android.content.Context;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.TextView;
public class TestActivity extends Activity {
/** Called when the activity is first created. */
protected String[] listImages;
protected String txt;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
GridView gridview = (GridView) findViewById(R.id.gridview);
// search files
this.listImages = listFile("/sdcard/projetv/test");
// to show files name
TextView text = (TextView) findViewById(R.id.txt);
text.setText(this.txt);
gridview.setAdapter(new ImageAdapter(this));
}
/*
* Return list of files in the directory "path", with extention "ext"
*/
protected String[] listFile(String path) {
File curs = new File(path);
String[] temp = curs.list();
this.txt = new String("");
if (temp != null)
for (int i = 0; i < temp.length; i++) {
this.txt = this.txt + " | " + temp[i];
temp[i] = path + "/" + temp[i];
}
return temp;
}
public class ImageAdapter extends BaseAdapter {
private Context mContext;
public ImageAdapter(Context c) {
mContext = c;
}
public int getCount() {
// return 20;
return listImages.length;
}
public Object getItem(int position) {
return null;
}
public long getItemId(int position) {
return 0;
}
// create a new ImageView for each item referenced by the Adapter
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView;
if (convertView == null) { // if it's not recycled, initialize some
// attributes
imageView = new ImageView(mContext);
imageView.setLayoutParams(new GridView.LayoutParams(85, 85));
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setPadding(8, 8, 8, 8);
} else {
imageView = (ImageView) convertView;
}
// load the image
imageView.setImageBitmap(BitmapFactory
.decodeFile(listImages[position]));
// load drawable
// imageView.setImageResource(R.drawable.ic_launcher);
return imageView;
}
}
}
的logcat：
06-18 07:14:33.625: D/dalvikvm(521): GC freed 687 objects/56160 bytes in 50ms
06-18 07:14:34.744: D/dalvikvm(521): GC freed 71 objects/35824 bytes in 44ms
06-18 07:14:35.544: D/dalvikvm(521): GC freed 139 objects/39392 bytes in 41ms
06-18 07:14:36.344: D/dalvikvm(521): GC freed 78 objects/68928 bytes in 44ms
06-18 07:14:39.184: D/dalvikvm(521): GC freed 179 objects/43424 bytes in 115ms
06-18 07:14:40.194: E/dalvikvm-heap(521): 3840000-byte external allocation too large for this process.
06-18 07:14:40.194: E/(521): VM won't let us allocate 3840000 bytes
06-18 07:14:40.194: D/skia(521): --- decoder->decode returned false
06-18 07:14:40.194: D/AndroidRuntime(521): Shutting down VM
06-18 07:14:40.194: W/dalvikvm(521): threadid=3: thread exiting with uncaught exception (group=0x4001b188)
06-18 07:14:40.194: E/AndroidRuntime(521): Uncaught handler: thread main exiting due to uncaught exception
06-18 07:14:40.204: E/AndroidRuntime(521): java.lang.OutOfMemoryError: bitmap size exceeds VM budget
06-18 07:14:40.204: E/AndroidRuntime(521): at android.graphics.BitmapFactory.nativeDecodeStream(Native Method)
06-18 07:14:40.204: E/AndroidRuntime(521): at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:459)
06-18 07:14:40.204: E/AndroidRuntime(521): at android.graphics.BitmapFactory.decodeFile(BitmapFactory.java:271)
06-18 07:14:40.204: E/AndroidRuntime(521): at android.graphics.BitmapFactory.decodeFile(BitmapFactory.java:296)
06-18 07:14:40.204: E/AndroidRuntime(521): at test.test.TestActivity$ImageAdapter.getView(TestActivity.java:92)
06-18 07:14:40.204: E/AndroidRuntime(521): at android.widget.AbsListView.obtainView(AbsListView.java:1256)
06-18 07:14:40.204: E/AndroidRuntime(521): at android.widget.GridView.makeAndAddView(GridView.java:1218)
06-18 07:14:40.204: E/AndroidRuntime(521): at android.widget.GridView.makeRow(GridView.java:265)
06-18 07:14:40.204: E/AndroidRuntime(521): at android.widget.GridView.fillSpecific(GridView.java:465)
06-18 07:14:40.204: E/AndroidRuntime(521): at android.widget.GridView.layoutChildren(GridView.java:1123)
06-18 07:14:40.204: E/AndroidRuntime(521): at android.widget.AbsListView.onLayout(AbsListView.java:1113)
06-18 07:14:40.204: E/AndroidRuntime(521): at android.view.View.layout(View.java:6830)
06-18 07:14:40.204: E/AndroidRuntime(521): at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1119)
06-18 07:14:40.204: E/AndroidRuntime(521): at android.widget.LinearLayout.layoutVertical(LinearLayout.java:998)
06-18 07:14:40.204: E/AndroidRuntime(521): at android.widget.LinearLayout.onLayout(LinearLayout.java:918)
06-18 07:14:40.204: E/AndroidRuntime(521): at android.view.View.layout(View.java:6830)
06-18 07:14:40.204: E/AndroidRuntime(521): at android.widget.FrameLayout.onLayout(FrameLayout.java:333)
06-18 07:14:40.204: E/AndroidRuntime(521): at android.view.View.layout(View.java:6830)
06-18 07:14:40.204: E/AndroidRuntime(521): at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1119)
06-18 07:14:40.204: E/AndroidRuntime(521): at android.widget.LinearLayout.layoutVertical(LinearLayout.java:998)
06-18 07:14:40.204: E/AndroidRuntime(521): at android.widget.LinearLayout.onLayout(LinearLayout.java:918)
06-18 07:14:40.204: E/AndroidRuntime(521): at android.view.View.layout(View.java:6830)
06-18 07:14:40.204: E/AndroidRuntime(521): at android.widget.FrameLayout.onLayout(FrameLayout.java:333)
06-18 07:14:40.204: E/AndroidRuntime(521): at android.view.View.layout(View.java:6830)
06-18 07:14:40.204: E/AndroidRuntime(521): at android.view.ViewRoot.performTraversals(ViewRoot.java:996)
06-18 07:14:40.204: E/AndroidRuntime(521): at android.view.ViewRoot.handleMessage(ViewRoot.java:1633)
06-18 07:14:40.204: E/AndroidRuntime(521): at android.os.Handler.dispatchMessage(Handler.java:99)
06-18 07:14:40.204: E/AndroidRuntime(521): at android.os.Looper.loop(Looper.java:123)
06-18 07:14:40.204: E/AndroidRuntime(521): at android.app.ActivityThread.main(ActivityThread.java:4363)
06-18 07:14:40.204: E/AndroidRuntime(521): at java.lang.reflect.Method.invokeNative(Native Method)
06-18 07:14:40.204: E/AndroidRuntime(521): at java.lang.reflect.Method.invoke(Method.java:521)
06-18 07:14:40.204: E/AndroidRuntime(521): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
06-18 07:14:40.204: E/AndroidRuntime(521): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
06-18 07:14:40.204: E/AndroidRuntime(521): at dalvik.system.NativeStart.main(Native Method)
06-18 07:14:40.224: I/dalvikvm(521): threadid=7: reacting to signal 3
06-18 07:14:40.224: E/dalvikvm(521): Unable to open stack trace file '/data/anr/traces.txt': Permission denied
步驟二：
我試圖在GridView控件加載圖片，就像你說的Luksprog，但它不工作。我想我沒有看到我能做到這一點。
新TestActivity.java：
package test.test;
import java.io.File;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.TextView;
public class TestActivity extends Activity {
/** Called when the activity is first created. */
protected String[] listImages;
protected String txt;
protected BitmapFactory.Options opt;
protected GridView.LayoutParams paramgrid;
public TestActivity() {
super();
// search files
if (this.listImages == null)
this.listImages = listFile("/sdcard/projetv/test");
// set options of thumbnails
this.opt = new BitmapFactory.Options();
this.opt.inPreferredConfig = Bitmap.Config.RGB_565;
this.opt.inSampleSize = 3;
this.paramgrid = new GridView.LayoutParams(85, 85);
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
GridView gridview = (GridView) findViewById(R.id.gridview);
// to show files name
TextView text = (TextView) findViewById(R.id.txt);
text.setText(this.txt);
// load images in GridView
ImageView imageView;
for(int i=0;i<this.listImages.length;i++){
imageView = new ImageView(this);
imageView.setLayoutParams(this.paramgrid);
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setPadding(8, 8, 8, 8);
imageView.setImageBitmap(BitmapFactory.decodeFile(this.listImages[i], this.opt));
gridview.addView(imageView, i);
}
}
/*
* Return list of files in the directory "path", with extention "ext"
*/
protected String[] listFile(String path) {
File curs = new File(path);
String[] temp = curs.list();
this.txt = new String("");
if (temp != null)
for (int i = 0; i < temp.length; i++) {
this.txt = this.txt + " | " + temp[i];
temp[i] = path + "/" + temp[i];
}
return temp;
}
}
的logcat：
06-20 07:48:50.946: D/dalvikvm(520): GC freed 773 objects/57808 bytes in 57ms
06-20 07:48:51.466: D/AndroidRuntime(520): Shutting down VM
06-20 07:48:51.466: W/dalvikvm(520): threadid=3: thread exiting with uncaught exception (group=0x4001b188)
06-20 07:48:51.466: E/AndroidRuntime(520): Uncaught handler: thread main exiting due to uncaught exception
06-20 07:48:51.466: E/AndroidRuntime(520): java.lang.RuntimeException: Unable to start activity ComponentInfo{test.test/test.test.TestActivity}: java.lang.UnsupportedOperationException: addView(View, int) is not supported in AdapterView
06-20 07:48:51.466: E/AndroidRuntime(520): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2496)
06-20 07:48:51.466: E/AndroidRuntime(520): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2512)
06-20 07:48:51.466: E/AndroidRuntime(520): at android.app.ActivityThread.access$2200(ActivityThread.java:119)
06-20 07:48:51.466: E/AndroidRuntime(520): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1863)
06-20 07:48:51.466: E/AndroidRuntime(520): at android.os.Handler.dispatchMessage(Handler.java:99)
06-20 07:48:51.466: E/AndroidRuntime(520): at android.os.Looper.loop(Looper.java:123)
06-20 07:48:51.466: E/AndroidRuntime(520): at android.app.ActivityThread.main(ActivityThread.java:4363)
06-20 07:48:51.466: E/AndroidRuntime(520): at java.lang.reflect.Method.invokeNative(Native Method)
06-20 07:48:51.466: E/AndroidRuntime(520): at java.lang.reflect.Method.invoke(Method.java:521)
06-20 07:48:51.466: E/AndroidRuntime(520): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
06-20 07:48:51.466: E/AndroidRuntime(520): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
06-20 07:48:51.466: E/AndroidRuntime(520): at dalvik.system.NativeStart.main(Native Method)
06-20 07:48:51.466: E/AndroidRuntime(520): Caused by: java.lang.UnsupportedOperationException: addView(View, int) is not supported in AdapterView
06-20 07:48:51.466: E/AndroidRuntime(520): at android.widget.AdapterView.addView(AdapterView.java:448)
06-20 07:48:51.466: E/AndroidRuntime(520): at test.test.TestActivity.onCreate(TestActivity.java:56)
06-20 07:48:51.466: E/AndroidRuntime(520): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
06-20 07:48:51.466: E/AndroidRuntime(520): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2459)
06-20 07:48:51.466: E/AndroidRuntime(520): ... 11 more
06-20 07:48:51.486: I/dalvikvm(520): threadid=7: reacting to signal 3
06-20 07:48:51.486: E/dalvikvm(520): Unable to open stack trace file '/data/anr/traces.txt': Permission denied
你有更多的信息來幫助我嗎？謝謝
從logcat中添加異常堆棧跟蹤。 – Luksprog
對不起，我忘了它 – user1458955
因爲您一次又一次地解碼適配器中的每個圖像，所以您的內存不足。你應該在'GridView'中延遲加載這些圖像。 – Luksprog