当我从最近的活动中滑动应用程序时，我两次得到了anr。然后应用程序正常工作，当我切换到横向模式时，我得到一个anr。该应用程序按预期工作，只要它不是面向风景或从最近的应用程序刷过。 有人可以指出我在这里做错了什么。 感谢
MyService.java：
public class MyService extends Service {
public static boolean started = false;
public static String TRANSACTION_DONE = "com.example.root.project";
private WebSocketClient client = null;
public static SQLiteDatabase myDataBase = null;
@Nullable
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public int onStartCommand(final Intent intent, int flags, int startId) {
if(started){
String message = intent.getStringExtra("message");
if(client != null){
client.send(message);
}
}
if (!started) {
myDataBase = openOrCreateDatabase("Messages.db", MODE_PRIVATE, null);
myDataBase.execSQL("CREATE TABLE IF NOT EXISTS messages " +
"(tag TEXT primary key, message TEXT);");
started = true;
URI uri = null;
try {
uri = new URI(intent.getStringExtra("ip"));
} catch (URISyntaxException e) {
e.printStackTrace();
}
client = new WebSocketClient(uri) {
@Override
public void onOpen(ServerHandshake serverHandshake) {
JSONObject jsonObject = null;
try {
jsonObject = new JSONObject();
jsonObject.accumulate("addme",intent.getStringExtra("name"));
} catch (JSONException e) {
e.printStackTrace();
}
client.send(jsonObject.toString());
}
@Override
public void onMessage(String message) {
JSONObject jsonObject = null;
try {
jsonObject = new JSONObject(message);
} catch (JSONException e) {
e.printStackTrace();
}
if (jsonObject.has("resolve")) {
PendingIntent notificIntent = PendingIntent.getActivity(getApplicationContext(), 0,
new Intent(getApplicationContext(), MainActivity.class), 0);
// Builds a notification
NotificationCompat.Builder mBuilder =
null;
try {
mBuilder = new NotificationCompat.Builder(getApplicationContext())
.setSmallIcon(R.drawable.add)
.setContentTitle(jsonObject.getString("name"))
.setTicker(jsonObject.getString("resolve"))
.setContentText(jsonObject.getString("destination"));
} catch (JSONException e) {
e.printStackTrace();
}
// Defines the Intent to fire when the notification is clicked
mBuilder.setContentIntent(notificIntent);
// Set the default notification option
// DEFAULT_SOUND : Make sound
// DEFAULT_VIBRATE : Vibrate
// DEFAULT_LIGHTS : Use the default light notification
mBuilder.setDefaults(Notification.DEFAULT_ALL);
// Auto cancels the notification when clicked on in the task bar
mBuilder.setAutoCancel(true);
// Gets a NotificationManager which is used to notify the user of the background event
NotificationManager mNotificationManager =
(NotificationManager) getApplicationContext().getSystemService(Context.NOTIFICATION_SERVICE);
// Post the notification
mNotificationManager.notify((int) System.currentTimeMillis(), mBuilder.build());
} else if (jsonObject.has("remove")) {
try {
String tag = jsonObject.getString("remove");
myDataBase.execSQL("DELETE FROM messages WHERE tag = " + tag + ";");
} catch (JSONException e) {
e.printStackTrace();
}
if (isForeground(TRANSACTION_DONE)) {
Intent broadcast = new Intent(TRANSACTION_DONE);
broadcast.putExtra("message", message);
sendBroadcast(broadcast);
}
} else {
try {
myDataBase.execSQL("INSERT INTO messages (tag, message) VALUES ('" +
jsonObject.getString("tag") + "', '" + message + "');");
} catch (JSONException e) {
e.printStackTrace();
}
if (isForeground(TRANSACTION_DONE)) {
Intent broadcast = new Intent(TRANSACTION_DONE);
broadcast.putExtra("message", message);
sendBroadcast(broadcast);
}
}
}
@Override
public void onClose(int i, String s, boolean b) {
Log.d("myTag", "onClose: websocket closing ");
Toast.makeText(getApplicationContext(),"closing websocket",Toast.LENGTH_LONG).show();
}
@Override
public void onError(Exception e) {
Log.i("Websocket", "Error " + e.getMessage());
}
};
client.connect();
}
return START_STICKY;
}
@Override
public void onTaskRemoved(Intent rootIntent) {
super.onTaskRemoved(rootIntent);
Toast.makeText(getApplicationContext(),"closing client",Toast.LENGTH_LONG).show();
client.close();
}
@Override
public void onDestroy() {
super.onDestroy();
Log.d("myTag", "onDestroy: service being destroyed ");
try {
client.closeBlocking();
} catch (InterruptedException e) {
e.printStackTrace();
}
Toast.makeText(this,"Service is closing on destroy called",Toast.LENGTH_LONG).show();
}
public boolean isForeground(String myPackage) {
ActivityManager manager = (ActivityManager) getSystemService(ACTIVITY_SERVICE);
List<ActivityManager.RunningTaskInfo> runningTaskInfo = manager.getRunningTasks(1);
ComponentName componentInfo = runningTaskInfo.get(0).topActivity;
return componentInfo.getPackageName().equals(myPackage);
}
}
MainActivity.java：
public class MainActivity extends AppCompatActivity {
private CustomAdapter adapter;
private String name;
private String ip;
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.add) {
final AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Title");
final View viewInflated = getLayoutInflater().inflate(R.layout.custom_dialog_layout, null);
builder.setView(viewInflated);
// Set up the buttons
builder.setPositiveButton("Publish", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
EditText editText = (EditText) viewInflated.findViewById(R.id.dialogTitle);
EditText editText2 = (EditText) viewInflated.findViewById(R.id.dialogDesc);
String title = editText.getText().toString().trim();
String desc = editText2.getText().toString().trim();
JSONObject jsonObject = new JSONObject();
try {
jsonObject.accumulate("title", title);
jsonObject.accumulate("desc", desc);
jsonObject.accumulate("name",name);
} catch (JSONException e) {
e.printStackTrace();
}
Intent intent = new Intent(MainActivity.this,MyService.class);
intent.putExtra("message",jsonObject.toString());
startService(intent);
}
});
builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
builder.show();
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if(MyPreferences.isFirst(this)) {
final AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Title");
final View viewInflated = getLayoutInflater().inflate(R.layout.login_dialog, null);
builder.setView(viewInflated);
// Set up the buttons
builder.setPositiveButton("Publish", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
EditText editText = (EditText) viewInflated.findViewById(R.id.dialogName);
EditText editText2 = (EditText) viewInflated.findViewById(R.id.dialogIp);
name = editText.getText().toString().trim();
ip = editText2.getText().toString().trim();
Intent intent = new Intent(MainActivity.this, MyService.class);
intent.putExtra("name", name);
intent.putExtra("ip", ip);
MainActivity.this.getSharedPreferences("my_preferences",MODE_PRIVATE).edit().putString("name",name).putString("ip",ip).commit();
startService(intent);
ListView listView = (ListView) findViewById(R.id.listView);
adapter = new CustomAdapter(MainActivity.this);
listView.setAdapter(adapter);
IntentFilter filter = new IntentFilter();
filter.addAction(MyService.TRANSACTION_DONE);
registerReceiver(myReceiver, filter);
new Handler().post(new Runnable() {
@Override
public void run() {
if (MyService.myDataBase == null) return;
Cursor cursor = MyService.myDataBase.rawQuery("SELECT * FROM messages", null);
int messageColumn = cursor.getColumnIndex("message");
cursor.moveToFirst();
if (cursor != null && (cursor.getCount() > 0)) {
do {
String message = cursor.getString(messageColumn);
try {
JSONObject jsonObject = new JSONObject(message);
adapter.add(jsonObject.getString("title"), jsonObject.getString("desc"), jsonObject.getString("tag"));
} catch (JSONException e) {
e.printStackTrace();
}
} while (cursor.moveToNext());
adapter.update();
}
}
});
}
});
builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
builder.show();
}else {
Intent intent = new Intent(this, MyService.class);
name = this.getSharedPreferences("my_preferences",MODE_PRIVATE).getString("name","no_name");
ip = this.getSharedPreferences("my_preferences",MODE_PRIVATE).getString("ip","no_ip");
intent.putExtra("name",name);
intent.putExtra("ip",ip);
startService(intent);
ListView listView = (ListView) findViewById(R.id.listView);
adapter = new CustomAdapter(this);
listView.setAdapter(adapter);
IntentFilter filter = new IntentFilter();
filter.addAction(MyService.TRANSACTION_DONE);
registerReceiver(myReceiver, filter);
new Handler().post(new Runnable() {
@Override
public void run() {
if (MyService.myDataBase == null) return;
Cursor cursor = MyService.myDataBase.rawQuery("SELECT * FROM messages", null);
int messageColumn = cursor.getColumnIndex("message");
cursor.moveToFirst();
if (cursor != null && (cursor.getCount() > 0)) {
do {
String message = cursor.getString(messageColumn);
try {
JSONObject jsonObject = new JSONObject(message);
adapter.add(jsonObject.getString("title"), jsonObject.getString("desc"), jsonObject.getString("tag"));
} catch (JSONException e) {
e.printStackTrace();
}
} while (cursor.moveToNext());
adapter.update();
}
}
});
}
}
@Override
protected void onDestroy() {
if (myReceiver != null) {
unregisterReceiver(myReceiver);
myReceiver = null;
}
super.onDestroy();
}
private BroadcastReceiver myReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String message = intent.getStringExtra("message");
Toast.makeText(MainActivity.this,message,Toast.LENGTH_LONG).show();
JSONObject jsonObject = null;
try {
jsonObject = new JSONObject(message);
if(jsonObject.has("remove")){
adapter.remove(jsonObject.getString("remove"));
adapter.update();
}else {
adapter.add(jsonObject.getString("title"), jsonObject.getString("desc"), jsonObject.getString("tag"));
adapter.update();
}
} catch (JSONException e) {
e.printStackTrace();
}
}
};
class CustomAdapter extends BaseAdapter {
private LayoutInflater inflater;
private ArrayList<ListViewData> objects;
public void add(String title, String desc, String tag) {
objects.add(new ListViewData(title, desc, tag));
}
public void remove(String tag){
for(ListViewData data : objects){
if(data.getTag().equals(tag)){
objects.remove(data);
break;
}
}
}
public void update(){
notifyDataSetChanged();
}
private class ViewHolder {
TextView title;
TextView description;
Button resolve;
Button subscribe;
Button unSubscribe;
}
public CustomAdapter(Context context) {
inflater = LayoutInflater.from(context);
objects = new ArrayList<>();
}
public int getCount() {
return objects.size();
}
public ListViewData getItem(int position) {
return objects.get(position);
}
public long getItemId(int position) {
return position;
}
public View getView(final int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
if (convertView == null) {
holder = new ViewHolder();
convertView = inflater.inflate(R.layout.custom_list_layout, null);
holder.title = (TextView) convertView.findViewById(R.id.title);
holder.description = (TextView) convertView.findViewById(R.id.desc);
holder.resolve = (Button) convertView.findViewById(R.id.resolve);
holder.subscribe = (Button) convertView.findViewById(R.id.subscribe);
holder.unSubscribe = (Button) convertView.findViewById(R.id.unsubscribe);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.title.setText(objects.get(position).getTitle());
holder.description.setText(objects.get(position).getDescription());
holder.resolve.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
final AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setTitle("Title");
final View viewInflated = getLayoutInflater().inflate(R.layout.custom_dialog2, null);
builder.setView(viewInflated);
// Set up the buttons
builder.setPositiveButton("Publish", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
EditText editText = (EditText) viewInflated.findViewById(R.id.name);
EditText editText2 = (EditText) viewInflated.findViewById(R.id.destination);
String name = editText.getText().toString().trim();
String destination = editText2.getText().toString().trim();
JSONObject jsonObject = new JSONObject();
try {
jsonObject.accumulate("name", name);
jsonObject.accumulate("destination", destination);
jsonObject.accumulate("resolve",objects.get(position).getTag());
} catch (JSONException e) {
e.printStackTrace();
}
Intent intent = new Intent(MainActivity.this,MyService.class);
intent.putExtra("message",jsonObject.toString());
startService(intent);
}
});
builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
builder.show();
}
});
holder.subscribe.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
String tag = objects.get(position).getTag();
try {
Intent intent = new Intent(MainActivity.this,MyService.class);
intent.putExtra("message",new JSONObject().accumulate("subscribe",tag).accumulate("name",name).toString());
startService(intent);
} catch (JSONException e) {
e.printStackTrace();
}
}
});
holder.unSubscribe.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
String tag = objects.get(position).getTag();
try {
Intent intent = new Intent(MainActivity.this,MyService.class);
intent.putExtra("message",new JSONObject().accumulate("unsubscribe",tag).accumulate("name",name).toString());
startService(intent);
} catch (JSONException e) {
e.printStackTrace();
}
}
});
return convertView;
}
}
}
class MyPreferences {
private static final String MY_PREFERENCES = "my_preferences";
public static boolean isFirst(Context context){
final SharedPreferences reader = context.getSharedPreferences(MY_PREFERENCES, Context.MODE_PRIVATE);
final boolean first = reader.getBoolean("is_first", true);
if(first){
final SharedPreferences.Editor editor = reader.edit();
editor.putBoolean("is_first", false);
editor.commit();
}
return first;
}
}