我想开发一个列表视图，其中包含此代码完成的图像和文本视图 完美，但我的代码分配了大量的堆内存，它没有释放内存。 我在ondestroy中初始化了所有空值，但它对我没有任何作用。
帮助我任何一个我坚持这个......
public class EventsActivity extends Activity implements OnClickListener {
private ListView mListview;
private EventsAdapter adapter;
InitialRequestResponseDto mInitialRequestResponseDto;
Context mContext;
private ImageButton mPlayButton;
//private ImageButton mRepeatButton;
private ImageButton mNextButton;
private ImageButton mPreviousButton;
//private ImageButton mStopButton;
TextView title, descrip;
ImageView songIcon;
boolean mBroadcastIsRegistered;
Intent intent, serIntent;
static ProgressDialog mdialog;
LazyImageLoader lazyImageLoader;
private static int songEnded = 0;
private TextView mHeading;
final String SUGGESTED_URL = "http://www.vorbis.com/music/Epoq-Lepidoptera.ogg";
RelativeLayout mRelativeLayout;
private ImageButton mHome;
private ImageButton mFm;
private String langid;
private ImageView mArrow;
Typeface tf,tf2;
private Button mBack;
String mRprgmname;
private TextView mPrgmTxtVw;
private TextView mPrgmName;
private RelativeLayout mrelative;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mContext = this;
setContentView(R.layout.commonsongslist);
mrelative = (RelativeLayout) findViewById(R.id.Rlplayall);
title = (TextView) findViewById(R.id.songnamemaint);
songIcon = (ImageView) findViewById(R.id.cntrylogo);
mPrgmTxtVw = (TextView) findViewById(R.id.prmnametxt);
mPrgmName = (TextView) findViewById(R.id.prmname);
mBack = (Button) findViewById(R.id.backs);
mHome = (ImageButton) findViewById(R.id.home);
mRelativeLayout = (RelativeLayout) findViewById(R.id.commonlayout);
mRelativeLayout.setBackgroundColor(Color.rgb(234, 183, 51));
mListview = (ListView) findViewById(R.id.listsongs);
mHeading = (TextView) findViewById(R.id.txtheading);
mPlayButton = (ImageButton) findViewById(R.id.btnPlay);
mNextButton = (ImageButton) findViewById(R.id.nextbtn);
mPreviousButton = (ImageButton) findViewById(R.id.prvsbtn);
mArrow = (ImageView) findViewById(R.id.arrowimage);
mArrow.setImageResource(R.drawable.events_a);
mFm = (ImageButton) findViewById(R.id.fmbtn);
Intent intent = getIntent();
langid = intent.getStringExtra("languageid");
lazyImageLoader = new LazyImageLoader(mContext);
mHeading.setText("Events");
DisplayMetrics metrics = mContext.getResources().getDisplayMetrics();
// mHeading.setTextSize(20/ metrics.scaledDensity);
if (metrics.scaledDensity < 1) {
mHeading.setTextSize(16);
} else if (metrics.scaledDensity >= 2) {
mHeading.setTextSize(16);
} else if (metrics.scaledDensity >= 1 && metrics.scaledDensity < 2) {
mHeading.setTextSize(18 / metrics.scaledDensity);
}
Typeface tf = Typeface.createFromAsset(this.getAssets(),
"fonts/Oswald-Bold.ttf");
mHeading.setTypeface(tf);
Typeface tf2 = Typeface.createFromAsset(this.getAssets(),
"fonts/arial.ttf");
mBack.setTypeface(tf2);
mBack.setBackgroundResource(R.drawable.events_back);
mRprgmname = getIntent().getStringExtra("name");
if (Utills.isNetworkAvailable(mContext)) {
mPlayButton.setOnClickListener(this);
mNextButton.setOnClickListener(this);
mPreviousButton.setOnClickListener(this);
}
mBack.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
onBackPressed();
}
});
mHome.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
LanguagesGetAsnchTask task = new LanguagesGetAsnchTask(
mContext, Constants.LANGUAGE_URL);
task.execute();
}
});
mFm.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
RadioAsynchTask
task=newRadioAsynchTask(mContext,Constants.channels,Constants.LANGUAGE_URL, langid,
mRprgmname);
task.execute();
}
});
mInitialRequestResponseDto = (InitialRequestResponseDto) getIntent()
.getSerializableExtra("events");
adapter = new EventsAdapter(this, 1, mInitialRequestResponseDto
.getInitialResposeBean().getEvevtsdto());
mListview.setAdapter(adapter);
mListview.invalidate();
mListview.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> arg0, View arg1, int pos,
long arg3) {
String title = mInitialRequestResponseDto
.getInitialResposeBean().getEvevtsdto().get(pos)
.getEvent_title();
String image = mInitialRequestResponseDto
.getInitialResposeBean().getEvevtsdto().get(pos)
.getEvent_poster();
String desc = mInitialRequestResponseDto
.getInitialResposeBean().getEvevtsdto().get(pos)
.getLong_desc();
Intent intent = new Intent(mContext, DetailedEvents.class);
intent.putExtra("image_path", image);
intent.putExtra("languageid", langid);
intent.putExtra("description", desc);
intent.putExtra("eventtitle", title);
intent.putExtra("name", mRprgmname);
startActivity(intent);
}
});
}
private void updateUi(Intent serviceIntent) {
if (songEnded == 1) {
mPlayButton.setImageResource(R.drawable.play);
updateUI();
}
}
private BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent serviceIntent) {
EventsActivity.this.serIntent = serviceIntent;
if (serviceIntent.getAction().equalsIgnoreCase(
MusicService.ACTION_STATE_CHANGED)) {
updateUI();
}
if (serviceIntent.getAction().equalsIgnoreCase(
MusicService.BROADCAST_ACTION)) {
updateUi(serviceIntent);
}
if (serviceIntent.getAction().equalsIgnoreCase(
MusicService.BROADCAST_BUFFER)) {
Toast.makeText(context, "Buffering",
Toast.LENGTH_LONG).show();
}
}
};
private void updateUI() {
RadioDto songItem = MusicHolder.getInstance().getCurrentItem();
State mState = MusicHolder.getInstance().getState();
if (mState == State.Playing) {
mPlayButton.setImageResource(R.drawable.pause);
} else if (mState == State.Paused || mState == State.Stopped) {
mPlayButton.setImageResource(R.drawable.play);
}
if (songItem != null) {
title.setSelected(true);
title.setText(songItem.getTitle());
title.setTypeface(tf2);
title.setTextColor(Color.rgb(234, 183, 51));
if (AMP.isAlbumname()) {
mPrgmTxtVw.setText("Album Name:");
} else {
mPrgmTxtVw.setText("Program Name:");
}
if (mRprgmname != null) {
mPrgmName.setText(mRprgmname);
} else {
mPrgmName.setText(" ");
}
mPrgmName.setSelected(true);
mPrgmName.setTypeface(tf2);
mPrgmTxtVw.setTypeface(tf2);
DisplayMetrics metrics = mContext.getResources()
.getDisplayMetrics();
if (metrics.scaledDensity < 1) {
title.setTextSize(16);
mPrgmTxtVw.setTextSize(14);
mPrgmName.setTextSize(14);
} else if (metrics.scaledDensity >= 2) {
title.setTextSize(16);
mPrgmTxtVw.setTextSize(14);
mPrgmName.setTextSize(14);
RelativeLayout.LayoutParams params =
(RelativeLayout.LayoutParams) mrelative
.getLayoutParams();
params.setMargins(0, 0, 0, 90); // left, top, right, bottom
mrelative.setLayoutParams(params);
} else if (metrics.scaledDensity >= 1 && metrics.scaledDensity < 2)
{
title.setTextSize(18 / metrics.scaledDensity);
mPrgmName.setTextSize(16 / metrics.scaledDensity);
mPrgmTxtVw.setTextSize(16 / metrics.scaledDensity);
}
if (songItem.getImage() != null) {
final String url = songItem.getImage();
songIcon.setTag(url);
Thread Moviesthread3 = new Thread(new Runnable() {
@Override
public void run() {
try {
Bitmap bitmap = Utills.getBitmapFromURL(url);
bitmap = Utills.getCircularBitmap(bitmap);
songIcon.setImageBitmap(bitmap);
bitmap.recycle();
} catch (Exception e) {
e.printStackTrace();
}
}
});
Moviesthread3.start();
songIcon.invalidate();
}
} else {
title.setText("Radio Khushi");
// descrip.setText("select song from playlist");
}
}
protected void onResume() {
super.onResume();
boolean dia = false;
registerReceiver(broadcastReceiver, new IntentFilter(
MusicService.ACTION_STATE_CHANGED));
registerReceiver(broadcastReceiver, new IntentFilter(
MusicService.BROADCAST_ACTION));
registerReceiver(broadcastReceiver, new IntentFilter(
MusicService.BROADCAST_BUFFER));
mBroadcastIsRegistered = true;
if (songEnded == 1) {
mPlayButton.setImageResource(R.drawable.play);
}
updateUI();
}
@Override
protected void onPause() {
super.onPause();
if (mBroadcastIsRegistered) {
try {
unregisterReceiver(broadcastReceiver);
mBroadcastIsRegistered = false;
} catch (Exception e) {
e.printStackTrace();
Toast.makeText(getApplicationContext(),
e.getClass().getName() + " " + e.getMessage(),
Toast.LENGTH_LONG).show();
}
}
}
public void onClick(View target) {
MusicHolder musicHolder = MusicHolder.getInstance();
final State mState = musicHolder.getState();
if (musicHolder.getItems().size() != 0) {
Intent intent = new Intent(this, MusicService.class);
if (target == mPlayButton) {
if (mState == State.Playing && mState != State.Preparing
&& mState != State.Retrieving) {
intent.setAction(MusicService.ACTION_PAUSE);
startService(intent);
} else if (mState == State.Paused || mState == State.Stopped) {
intent.setAction(MusicService.ACTION_PLAY);
startService(intent);
}
} else if (target == mNextButton) {
intent.setAction(MusicService.ACTION_SKIP);
mNextButton.setBackgroundResource(R.drawable.next_pressed);
startService(intent);
String time = "";
int index = musicHolder.getIndex();
InitialRequestResponseDto mInitialRequestResponseDto1 = null;
InitialResposeBean ini = new InitialResposeBean();
ini.setRadiolist(musicHolder.getItems());
mInitialRequestResponseDto1 = new InitialRequestResponseDto();
mInitialRequestResponseDto1.setInitialResposeBean(ini);
index++;
if (index == mInitialRequestResponseDto1
.getInitialResposeBean().getRadiolist().size()) {
index = 0;
}
time = mInitialRequestResponseDto1.getInitialResposeBean()
.getRadiolist().get(index).getTime_zone();
String[] s = time.split(" ");
TimeZone tz = TimeZone.getTimeZone("GMT" + s[0] + s[1]);
Calendar c = Calendar.getInstance(tz);
String caltime = c.get(Calendar.HOUR_OF_DAY) + "."
+ c.get(Calendar.MINUTE);
mRprgmname = Utills.getpname1(mInitialRequestResponseDto1,
index, caltime, Utills.getdayofweek());
} else if (target == mPreviousButton) {
intent.setAction(MusicService.ACTION_REWIND);
mPreviousButton.setBackgroundResource(R.drawable.prev_pressed);
startService(intent);
String time = "";
InitialRequestResponseDto mInitialRequestResponseDto1 = null;
int index = musicHolder.getIndex();
InitialResposeBean ini = new InitialResposeBean();
ini.setRadiolist(musicHolder.getItems());
mInitialRequestResponseDto1 = new InitialRequestResponseDto();
mInitialRequestResponseDto1.setInitialResposeBean(ini);
index--;
if (index == -1) {
index = mInitialRequestResponseDto1.getInitialResposeBean()
.getRadiolist().size() - 1;
}
time = mInitialRequestResponseDto1.getInitialResposeBean()
.getRadiolist().get(index).getTime_zone();
String[] s = time.split(" ");
TimeZone tz = TimeZone.getTimeZone("GMT" + s[0] + s[1]);
Calendar c = Calendar.getInstance(tz);
String caltime = c.get(Calendar.HOUR_OF_DAY) + "."
+ c.get(Calendar.MINUTE);
mRprgmname = Utills.getpname1(mInitialRequestResponseDto1,
index, caltime, Utills.getdayofweek());
}
} else {
Toast.makeText(mContext, "No Song In Holder", Toast.LENGTH_LONG)
.show();
}
if (mState == State.Stopped) {
Toast.makeText(mContext, "No Song In Holder", Toast.LENGTH_LONG)
.show();
}
}
protected void onDestroy() {
super.onDestroy();
Toast.makeText(mContext, "events ondestroy", Toast.LENGTH_SHORT).show();
mrelative=null;mPrgmName=null;mPrgmTxtVw=null;
mBack=null;
tf=null;
tf2=null;
mArrow=null;
mFm=null;
mHome=null;
mRelativeLayout=null;
mHeading=null;
lazyImageLoader=null;
mdialog=null;
intent=null;
serIntent=null;
songIcon=null;
title=null;
descrip=null;
mPreviousButton=null;
mNextButton=null;
mPlayButton=null;
mContext=null;
mInitialRequestResponseDto=null;
adapter=null;
mListview=null;
System.gc();
}
}
，适配器类是
package com.onlineradio.adapters;
import java.util.List;
import android.content.Context;
import android.graphics.Typeface;
import android.util.DisplayMetrics;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import com.onlineradio.Utils.LazyImageLoader;
import com.onlineradio.dto.EventsDto;
import com.siriinnovations.radiokhushi.R;
public class EventsAdapter extends ArrayAdapter<EventsDto> {
Context mContext;
EventsDto category;
public LazyImageLoader lazyImageLoader;
List<EventsDto> categories;
int selectedLanguage;
public EventsAdapter(Context context, int textViewResourceId,
List<EventsDto> list) {
super(context, textViewResourceId, list);
this.categories = list;
this.mContext = context;
lazyImageLoader = new LazyImageLoader(mContext.getApplicationContext());
}
@Override
public int getCount() {
return categories.size();
}
public EventsDto getItem(int position) {
return super.getItem(position);
}
@Override
public long getItemId(int position) {
return position;
}
public static class ViewHolder {
public TextView mEvntName;
public ImageView mImage;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View vi = convertView;
ViewHolder holder;
category = getItem(position);
// if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) mContext
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
vi = inflater.inflate(R.layout.event_row, parent, false);
holder = new ViewHolder();
holder.mEvntName = (TextView) vi.findViewById(R.id.eventname);
holder.mImage = (ImageView) vi.findViewById(R.id.eventimage);
vi.setTag(holder);
// } else {
// holder = (ViewHolder) vi.getTag();
// }
String title = categories.get(position).getEvent_title();
holder.mEvntName.setText(title);
Typeface tf = Typeface.createFromAsset(mContext.getAssets(),
"fonts/arial.ttf");
holder.mEvntName.setTypeface(tf);
DisplayMetrics metrics = mContext.getResources().getDisplayMetrics();
// holder.mEvntName.setTextSize(15 / metrics.scaledDensity);
if (metrics.scaledDensity < 1) {
holder.mEvntName.setTextSize(16);
} else if (metrics.scaledDensity >= 2) {
holder.mEvntName.setTextSize(14);
} else if (metrics.scaledDensity >= 1 && metrics.scaledDensity < 2) {
holder.mEvntName.setTextSize(18 / metrics.scaledDensity);
}
String imageurl = categories.get(position).getEvent_poster();
// holder.mImage.setImageBitmap(Utills.getBitmapFromURL(imageurl));
// new DownloadImageTask((ImageView) vi.findViewById(R.id.eventimage))
// .execute(imageurl);
// if ((imageurl == null) || imageurl.equalsIgnoreCase("null")) {
// holder.mImage.setVisibility(ImageView.GONE);
//
// } else {
lazyImageLoader.displayImage(imageurl, holder.mImage,
R.drawable.ic_launcher);
// holder.mImage.setLayoutParams(new ViewGroup.LayoutParams(
// WindowManager.LayoutParams.MATC`enter code here`H_PARENT,
// WindowManager.LayoutParams.WRAP_CONTENT));
// holder.mImage.setImageBitmap(Utills.getBitmapFromURL(imageurl));
holder.mImage.setTag(imageurl);
// holder.mImage.invalidate();
return vi;
}
}