我正在尝试为Gallery的电视制作一个应用程序，用于显示常规电影/幻灯片放映，当远程触摸移动到下一个活动时，他们可以通过纵向和名称选择艺术家，当用dpad中心选择一个将移动时在具有第一页面肖像和文本信息的视图切换器上，并且在dpad上具有右/左，来自info-＆gt;视频，关于他如何完成他的工作（可选） - ＆gt;他的＆gt;图像的图像n-＆gt;资讯
好了，我的问题是：
08-05 23:36:54.915: W/Trace(11124): error opening trace file: No such file or directory (2)
08-05 23:36:54.920: W/ActivityThread(11124): Application com.tsfat.galleyTV is waiting for the debugger on port 8100...
08-05 23:36:54.935: I/System.out(11124): Sending WAIT chunk
08-05 23:36:54.950: I/dalvikvm(11124): Debugger is active
08-05 23:36:55.135: I/System.out(11124): Debugger has connected
08-05 23:36:55.135: I/System.out(11124): waiting for debugger to settle...
08-05 23:36:55.340: I/System.out(11124): waiting for debugger to settle...
08-05 23:36:55.540: I/System.out(11124): waiting for debugger to settle...
08-05 23:36:55.740: I/System.out(11124): waiting for debugger to settle...
08-05 23:36:55.940: I/System.out(11124): waiting for debugger to settle...
08-05 23:36:56.140: I/System.out(11124): waiting for debugger to settle...
08-05 23:36:56.345: I/System.out(11124): waiting for debugger to settle...
08-05 23:36:56.545: I/System.out(11124): waiting for debugger to settle...
08-05 23:36:56.745: I/System.out(11124): waiting for debugger to settle...
08-05 23:36:56.945: I/System.out(11124): waiting for debugger to settle...
08-05 23:36:57.145: I/System.out(11124): waiting for debugger to settle...
08-05 23:36:57.350: I/System.out(11124): debugger has settled (1421)
08-05 23:36:58.030: D/MediaPlayer(11124): getMetadata
08-05 23:36:58.120: W/MediaPlayer(11124): info/warning (3, 0)
08-05 23:36:58.125: I/MediaPlayer(11124): Info (3,0)
08-05 23:37:30.340: I/ScreenSaverActivity(11124): Calling Intent
08-05 23:37:30.570: I/NamesList(11124): [Ishai Haviv,Kitzis,Sharon,]
08-05 23:37:30.615: I/ArtistAdapter.getView-position(11124): 0
08-05 23:37:30.635: I/ArtistPickerActivity.update()(11124): Initializing Thread for Ishai Haviv
08-05 23:37:30.640: E/BitmapWorkerTask(11124): get returns null
08-05 23:37:30.700: I/ArtistAdapter.getView-position(11124): 0
08-05 23:37:30.700: I/ArtistPickerActivity.update()(11124): Initializing Thread for Ishai Haviv
08-05 23:37:30.705: D/BitmapWorkerTask(11124): GOOD
08-05 23:37:30.710: I/ArtistAdapter.getView-position(11124): 1
08-05 23:37:30.715: I/ArtistPickerActivity.update()(11124): Initializing Thread for Kitzis
08-05 23:37:30.715: E/BitmapWorkerTask(11124): get returns null
08-05 23:37:30.720: I/ArtistAdapter.getView-position(11124): 2
08-05 23:37:30.725: I/ArtistPickerActivity.update()(11124): Initializing Thread for Sharon
08-05 23:37:30.725: E/BitmapWorkerTask(11124): get returns null
08-05 23:37:30.735: I/ArtistAdapter.getView-position(11124): 0
08-05 23:37:30.740: I/ArtistPickerActivity.update()(11124): Initializing Thread for Ishai Haviv
08-05 23:37:30.740: E/BitmapWorkerTask(11124): get returns null
08-05 23:37:30.815: I/ArtistAdapter.getView-position(11124): 0
08-05 23:37:30.820: I/ArtistPickerActivity.update()(11124): Initializing Thread for Ishai Haviv
08-05 23:37:30.820: D/BitmapWorkerTask(11124): GOOD
08-05 23:37:30.835: I/ArtistAdapter.getView-position(11124): 0
08-05 23:37:30.835: I/ArtistPickerActivity.update()(11124): Initializing Thread for Ishai Haviv
08-05 23:37:30.835: D/BitmapWorkerTask(11124): GOOD
08-05 23:37:30.845: I/ArtistAdapter.getView-position(11124): 0
08-05 23:37:30.845: I/ArtistPickerActivity.update()(11124): Initializing Thread for Ishai Haviv
08-05 23:37:30.850: D/BitmapWorkerTask(11124): GOOD
08-05 23:37:30.850: I/ArtistAdapter.getView-position(11124): 1
08-05 23:37:30.850: I/ArtistPickerActivity.update()(11124): Initializing Thread for Kitzis
08-05 23:37:30.855: D/BitmapWorkerTask(11124): GOOD
08-05 23:37:30.855: I/ArtistAdapter.getView-position(11124): 2
08-05 23:37:30.860: I/ArtistPickerActivity.update()(11124): Initializing Thread for Sharon
08-05 23:37:30.860: D/BitmapWorkerTask(11124): GOOD
08-05 23:37:30.935: D/BitmapWorkerTask(11124): GOOD
08-05 23:45:59.935: D/AndroidRuntime(11124): Shutting down VM
08-05 23:45:59.935: W/dalvikvm(11124): threadid=1: thread exiting with uncaught exception (group=0x40b79930)
08-05 23:45:59.985: E/AndroidRuntime(11124): FATAL EXCEPTION: main
08-05 23:45:59.985: E/AndroidRuntime(11124): java.lang.NullPointerException
08-05 23:45:59.985: E/AndroidRuntime(11124): at com.tsfat.galleyTV.ArtistPickerActivity$BitmapWorkerTask.onPostExecute(ArtistPickerActivity.java:263)
08-05 23:45:59.985: E/AndroidRuntime(11124): at android.os.AsyncTask.finish(AsyncTask.java:631)
08-05 23:45:59.985: E/AndroidRuntime(11124): at android.os.AsyncTask.access$600(AsyncTask.java:177)
08-05 23:45:59.985: E/AndroidRuntime(11124): at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:644)
08-05 23:45:59.985: E/AndroidRuntime(11124): at android.os.Handler.dispatchMessage(Handler.java:99)
08-05 23:45:59.985: E/AndroidRuntime(11124): at android.os.Looper.loop(Looper.java:137)
08-05 23:45:59.985: E/AndroidRuntime(11124): at android.app.ActivityThread.main(ActivityThread.java:5227)
08-05 23:45:59.985: E/AndroidRuntime(11124): at java.lang.reflect.Method.invokeNative(Native Method)
08-05 23:45:59.985: E/AndroidRuntime(11124): at java.lang.reflect.Method.invoke(Method.java:511)
08-05 23:45:59.985: E/AndroidRuntime(11124): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795)
08-05 23:45:59.985: E/AndroidRuntime(11124): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:562)
08-05 23:45:59.985: E/AndroidRuntime(11124): at dalvik.system.NativeStart.main(Native Method)
08-05 23:46:00.110: I/Process(11124): Sending signal. PID: 11124 SIG: 9
不知道发生了什么!!
这是我的新代码：
package com.tsfat.galleyTV;
import java.io.File;
import java.lang.ref.WeakReference;
import android.R.bool;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.ImageView.ScaleType;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;
public class ArtistPickerActivity extends Activity implements
AdapterView.OnItemClickListener {
String GALLERY_ROOT;
GridView menu;
Context c = this;
String[] names;
Bitmap mPlaceHolderBitmap;
/*
* private Runnable onTimeOut = new Runnable() {
*
* @Override public void run() { // TODO Auto-generated method stub Intent i
* = new Intent("android.intent.action.MAIN"); c.startActivity(i); }
*
* };
*
* Handler hTimeout = new Handler();
*/
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.artist_picker_layout);
// getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
getActionBar()
.setTitle(
"Navigate and select with dpad to get to know the Artist's work");
GALLERY_ROOT = getSharedPreferences("Gallery Path", 0).getString(
"GalleryPath", "storage/GALLERY/Gallery");
GridView gv = (GridView) findViewById(R.id.gridview);
gv.setAdapter(new ArtistsAdapter(this));
gv.setOnItemClickListener(this);
mPlaceHolderBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.loading_image);
// hTimeout.postDelayed(onTimeOut, 60*1000);
}
/*
* @Override public void onUserInteraction() { // TODO Auto-generated method
* stub super.onUserInteraction(); hTimeout.removeCallbacks(onTimeOut);
* hTimeout.postDelayed(onTimeOut, 60*1000); }
*/
public class ArtistView extends LinearLayout {
private ImageView portrait;
private TextView title;
public ArtistView(Context context, String name) {
super(context);
this.setPadding(8, 8, 8, 8);
this.setOrientation(VERTICAL);
portrait = new ImageView(c);
title = new TextView(c);
title.setGravity(Gravity.CENTER_HORIZONTAL);
portrait.setScaleType(ScaleType.CENTER_INSIDE);
addView(portrait);
addView(title);
update(name);
}
public void update(String name) {
Log.i("ArtistPickerActivity.update()", "Initializing Thread for "
+ name);
((TextView) getChildAt(1)).setText(name);
loadBitmap(new File(GALLERY_ROOT + "/Artists/" + name + "/Portrait.png"),
(ImageView) getChildAt(0));
}
}
public class ArtistsAdapter extends BaseAdapter {
Context c;
ArtistsAdapter(Context context) {
c = context;
File f = new File(GALLERY_ROOT + "/Artists");
if (!f.exists()) {
Toast.makeText(
c,
"Gallery file system not setup correctly!!\n"
+ "Please talk to manager to get fixed. Sorry for the annoyance.",
Toast.LENGTH_LONG).show();
finish();
}
names = f.list();
Log.i("NamesList", printArray(names));
}
private String printArray(String[] names) {
StringBuilder res = new StringBuilder();
res.append('[');
for (String i : names) {
res.append(i + ",");
}
res.append(']');
return res.toString();
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return names.length;
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return new File(GALLERY_ROOT + "/Artists/" + names[position] + "/Portrait.png");
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
Log.i("ArtistAdapter.getView-position", position + "");
ArtistView res = (ArtistView) convertView;
if (res == null)
res = new ArtistView(c, names[position]);
else
res.update(names[position]);
return res;
}
}
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
// TODO Auto-generated method stub
Log.i("GridViewItemClicked","Starting Activity with " + names[position]);
Intent moreInfo = new Intent(this,ArtistInfoActivity.class);
moreInfo.putExtra("name", names[position]);
startActivity(moreInfo);
}
public Bitmap decodeSampledBitmapFromResource(String file,
int reqWidth, int reqHeight) {
// First decode with inJustDecodeBounds=true to check dimensions
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(file, options);
// Calculate inSampleSize
options.inSampleSize = calculateInSampleSize(options, reqWidth,
reqHeight);
// Decode bitmap with inSampleSize set
options.inJustDecodeBounds = false;
return BitmapFactory.decodeFile(file, options);
}
public void loadBitmap(File path, ImageView imageView) {
if (cancelPotentialWork(path, imageView)) {
final BitmapWorkerTask task = new BitmapWorkerTask(imageView);
final AsyncDrawable asyncDrawable = new AsyncDrawable(mPlaceHolderBitmap, task);
imageView.setImageDrawable(asyncDrawable);
task.execute(path);
}
}
public static boolean cancelPotentialWork(File path, ImageView imageView) {
final BitmapWorkerTask bitmapWorkerTask = getBitmapWorkerTask(imageView);
if (bitmapWorkerTask != null) {
final File bitmapData = bitmapWorkerTask.data;
if (bitmapData != path) {
// Cancel previous task
bitmapWorkerTask.cancel(true);
} else {
// The same work is already in progress
return false;
}
}
// No task associated with the ImageView, or an existing task was
// cancelled
return true;
}
static class AsyncDrawable extends BitmapDrawable {
private final WeakReference<BitmapWorkerTask> bitmapWorkerTaskReference;
public AsyncDrawable(Bitmap bitmap,
BitmapWorkerTask bitmapWorkerTask) {
super(bitmap);
bitmapWorkerTaskReference = new WeakReference<BitmapWorkerTask>(bitmapWorkerTask);
}
public BitmapWorkerTask getBitmapWorkerTask() {
return bitmapWorkerTaskReference.get();
}
}
class BitmapWorkerTask extends AsyncTask {
private final WeakReference<ImageView> imageViewReference;
private File data;
public BitmapWorkerTask(ImageView imageView) {
// Use a WeakReference to ensure the ImageView can be garbage
// collected
imageViewReference = new WeakReference<ImageView>(imageView);
}
// Decode image in background.
@Override
protected Bitmap doInBackground(Object... params) {
data = (File) params[0];
if(imageViewReference != null){
ImageView iv = imageViewReference.get();
return decodeSampledBitmapFromResource(data.toString(),iv.getWidth(),iv.getHeight());
}
Log.e("BitmapWorkerTask", "doInBackground is null");
return null;
}
@Override
protected void onPostExecute(Object bitmap) {
if (isCancelled()) {
bitmap = null;
return;
}
if (imageViewReference != null && bitmap != null) {
final ImageView imageView = imageViewReference
.get();
final BitmapWorkerTask bitmapWorkerTask = getBitmapWorkerTask(imageView);
if (/*this == bitmapWorkerTask && */imageView != null) {
imageView.setImageBitmap((Bitmap) bitmap);
((BaseAdapter) menu.getAdapter()).notifyDataSetChanged();
}
Log.i("onPostExecute","this: " + (this==bitmapWorkerTask ? "not equal" : "GOOD"));
Log.i("onPostExecute","imageview: " + (imageView==null ? "null" : "GOOD"));
}
Log.i("onPostExecute","imageView reference: " + (imageViewReference==null ? "null" : "GOOD"));
Log.i("onPostExecute","bitmap: " + (bitmap==null ? "null" : "GOOD"));
}
}
public static int calculateInSampleSize(BitmapFactory.Options options,
int reqWidth, int reqHeight) {
// Raw height and width of image
final int height = options.outHeight;
final int width = options.outWidth;
int inSampleSize = 1;
if (height > reqHeight || width > reqWidth) {
// Calculate ratios of height and width to requested height and
// width
final int heightRatio = Math.round((float) height
/ (float) reqHeight);
final int widthRatio = Math.round((float) width / (float) reqWidth);
// Choose the smallest ratio as inSampleSize value, this will
// guarantee
// a final image with both dimensions larger than or equal to the
// requested height and width.
inSampleSize = heightRatio < widthRatio ? heightRatio : widthRatio;
}
return inSampleSize;
}
private static BitmapWorkerTask getBitmapWorkerTask(ImageView imageView) {
if (imageView != null) {
final Drawable drawable = imageView.getDrawable();
if (drawable instanceof AsyncDrawable) {
final AsyncDrawable asyncDrawable = (AsyncDrawable) drawable;
Log.d("BitmapWorkerTask","GOOD");
return asyncDrawable.getBitmapWorkerTask();
}
}
Log.e("BitmapWorkerTask","get returns null");
return null;
}
}
请帮助，我需要完成这件事!!
答案 0 :(得分：0)
当您想要更改UI（文本，图像等）时，您必须在主（UI）线程中进行。
您可以使用runOnUiThreadMethod：
myActivity.runOnUiThread(new Runnable() {
@Override
public void run() {
// Code modifying the UI
}
});