我已将活动的方向设置为横向，除了一种情况外，它保持在该状态。情况是屏幕锁定。当我的活动正在运行并且我锁定我的屏幕时，它会在一段时间内将方向从横向更改为纵向并导致我的应用程序要重新启动并且我不想要。任何解决方案......？
package com.example.hello;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import android.app.Activity;
import android.app.KeyguardManager;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.SharedPreferences;
import android.media.MediaPlayer;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Environment;
import android.os.PowerManager;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.MediaController;
import android.widget.Spinner;
import android.widget.Toast;
import android.widget.VideoView;
public class MainActivity extends Activity{
VideoView vv;
public ArrayList<String> list = new ArrayList<String>();
int n,positio = 0;
String file = null;
Spinner spin;
MediaPlayer mp;
Intent intent;
File fl;
boolean isPlaying = true;
boolean screenOn = false;
PowerManager pm;
@Override
public void onCreate(Bundle savedInstance){
super.onCreate(savedInstance);
Log.d("zaid iqbal", "in onCreate");
requestFullScreen();
setContentView(R.layout.activity_main);
vv = (VideoView)findViewById(R.id.video);
spin = (Spinner)findViewById(R.id.spinner);
MediaController mc = new MediaController(this);
pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
vv.setMediaController(mc);
setupSpin();
}
@Override
protected void onPause() {
// TODO Auto-generated method stub
//Log.d("zaid iqbal", "in onPause");
isPlaying = vv.isPlaying();
screenOn = pm.isScreenOn();
if (screenOn && isPlaying) {
// Screen is still on, so do your thing here
n++;
positio = vv.getCurrentPosition();
vv.pause();
//Toast.makeText(this, file, Toast.LENGTH_LONG).show();
intent = new Intent(this,playBack.class);
intent.putExtra("file", file);
intent.putExtra("position", positio);
intent.putExtra("n", n);
startService(intent);
}
if(!isPlaying){
positio = vv.getCurrentPosition();
}
super.onPause();
}
@Override
protected void onResume() {
// TODO Auto-generated method stub
//Log.d("zaid iqbal", "in onResume");
if(!isPlaying){
vv.setVideoPath(file);
vv.seekTo(positio);
}else{
async aa = new async();
aa.execute();
}
super.onResume();
}
@Override
public void onBackPressed() {
// TODO Auto-generated method stub
}
public void requestFullScreen(){
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN
,WindowManager.LayoutParams.FLAG_FULLSCREEN);
}
public void setupSpin(){
File root = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/Video/");
listFiles(root);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item,list);
spin.setAdapter(adapter);
spin.setOnItemSelectedListener(new OnItemSelectedListener(){
@Override
public void onItemSelected(AdapterView<?> arg0, View arg1,
int position, long id) {
// TODO Auto-generated method stub
//Log.d("zaid iqbal","in onclick of spin");
if(n == 0){
file = Environment.getExternalStorageDirectory().getAbsolutePath() + "/Video/" + list.get(position);
Log.d("zaid", file);
//Toast.makeText(MainActivity.this, "original" + file, Toast.LENGTH_SHORT).show();
vv.setVideoPath(file);
vv.start();
}
//n = 0;
/*File fl = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/Video/","settings.txt");
try {
BufferedReader reader = new BufferedReader(new FileReader(fl));
file = reader.readLine();
position = Integer.parseInt(reader.readLine());
reader.close();
BufferedWriter writer = new BufferedWriter(new FileWriter(fl));
writer.write(file);
writer.write(position);
writer.write(n);
position = Integer.parseInt(reader.readLine());
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}*/
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
});
}
public void listFiles(File f){
try{
File[] files = f.listFiles();
for(File file : files){
if(file.isFile()){
String filenameArray[] = file.toString().split("\\.");
String extension = filenameArray[filenameArray.length-1];
//if(extension == "mp4" || extension == "3gp")
list.add(file.getName());
}
}
}catch(Exception e){
e.printStackTrace();
}
}
class async extends AsyncTask<String,Long,Long>{
@Override
protected Long doInBackground(String... params) {
// TODO Auto-generated method stub
if(intent != null){
stopService(intent);
//Reading file
}
return null;
}
@Override
protected void onPostExecute(Long result) {
// TODO Auto-generated method stub
fl = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/Video/","settings.txt");
try {
//Log.d("zaid iqbal", "getted file");
BufferedReader reader = new BufferedReader(new FileReader(fl));
file = reader.readLine();
//Toast.makeText(MainActivity.this, "getted file" + file, Toast.LENGTH_SHORT).show();
positio = Integer.parseInt(reader.readLine());
n = Integer.parseInt(reader.readLine());
reader.close();
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if(n != 0){
n=0;
try {
BufferedWriter writer = new BufferedWriter(new FileWriter(fl));
writer.write(file + "\n" + positio + "\n" + n);
writer.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
vv.setVideoPath(file);
vv.seekTo(positio);
vv.start();
}
super.onPostExecute(result);
}
}
}