由于某种原因，我已经测试了音乐上的应用程序，在您更改视图并返回后，音乐不会重新启动。它在我的手机上完美运行，但我的两个测试人员和我的女儿平板电脑也是如此。当您打开电话簿或任何使音乐停止时切断音乐（计划），但当您关闭电子邮件/电话屏幕时，音乐不会重新启动（对于他们）它对我来说很好。
如何确保在拨打电话后重启音乐，或发送电子邮件并返回主视图？
这是我的主Java：
package w1r.wilder1radio;
import android.annotation.TargetApi;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Button;
import android.widget.Toast;
import com.pushbots.push.Pushbots;
public class MainActivity extends Activity implements MediaPlayer.OnPreparedListener {
MediaPlayer mp;
//Button Names
Button btncall;
Button btnqrcode;
Button btnemail;
Button btnshare;
Button navfacebook;
Button navtwitter;
Button navgoogleplus;
@Override
public void onPrepared(MediaPlayer mp) {
if (!mp.isPlaying())
if ((mp != null)) {
mp.start();
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Pushbots.sharedInstance().init(this);
AppRater.app_launched(this);
//Now Playing WebView
WebView view = (WebView) this.findViewById(R.id.webView);
view.setWebViewClient(new WebViewClient());
view.getSettings().setJavaScriptEnabled(true);
String url2 = "http://markesswilder.com/w1rnowplaying.html";
view.loadUrl(url2);
//Media Player
try {
mp = new MediaPlayer();
String url = "http://75.126.73.136:8042/;";
mp.setAudioStreamType(AudioManager.STREAM_MUSIC);
mp.setDataSource(url);
mp.prepareAsync();
mp.setOnPreparedListener(this);
if (mp!=null) {
initMediaPlayer();
} else if (!mp.isPlaying()) mp.start();
} catch (Exception e) {
Log.i("ExceptionOnCreate:", e.getMessage());
e.getMessage();
Toast.makeText(this,
"Please check your WiFi/or Carrier Service and try again", Toast.LENGTH_LONG).show();
}
//Button id
btncall = (Button) findViewById(R.id.btncall);
btnqrcode = (Button) findViewById(R.id.btnqrcode);
btnemail = (Button) findViewById(R.id.btnemail);
btnshare = (Button) findViewById(R.id.btnshare);
//Menu Buttons
navfacebook = (Button) findViewById(R.id.navfacebook);
navtwitter = (Button) findViewById(R.id.navtwitter);
navgoogleplus = (Button) findViewById(R.id.navgoogleplus);
//Button Clicks
btncall.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
sendToCall();
}
});
btnqrcode.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
sendToQrCode();
}
});
btnemail.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
goToEmail();
}
});
btnshare.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
goToShare();
}
});
navfacebook.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
sendToNavFaceBook();
}
});
navtwitter.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
sendToNavTwitter();
}
}
);
navgoogleplus.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
sendToNavGooglePlus();
}
}
);
}
//???
private void initMediaPlayer() {
}
//Button Clicks Handlers
@TargetApi(Build.VERSION_CODES.HONEYCOMB)
protected void sendToCall() {
AlertDialog.Builder builder1 = new AlertDialog.Builder(this, AlertDialog.THEME_HOLO_LIGHT);
builder1.setIcon(R.drawable.shoutoutslogo);
builder1.setTitle("Call Us");
builder1.setInverseBackgroundForced(true);
builder1.setCancelable(false);
builder1.setMessage("Want to hear your voice on our station? " +
"Send us your name and where you're calling from. If we like it we'll put it on the air. " +
"Just remember to finish with - Wilder1Radio Go Ahead GET WILD!");
builder1.setPositiveButton("I'M READY TO SHOUT", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
//if user pressed "yes", then open phone pad
Intent callIntent = new Intent(Intent.ACTION_VIEW);
callIntent.setData(Uri.parse("tel:+1 614-383-9939"));
startActivity(callIntent);
}
});
builder1.setNegativeButton("NOT READY", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
//if user selects "No", cancel this dialog and continue with the app
dialog.cancel();
Toast.makeText(MainActivity.this, "Continue to enjoy the music.", Toast.LENGTH_SHORT).show();
}
});
AlertDialog alert = builder1.create();
alert.show();
}
@TargetApi(Build.VERSION_CODES.HONEYCOMB)
protected void sendToQrCode() {
AlertDialog.Builder builder2 = new AlertDialog.Builder(this, AlertDialog.THEME_HOLO_DARK);
builder2.setIcon(R.drawable.qrwilder1radio);
builder2.setTitle("Scan Me");
builder2.setInverseBackgroundForced(true);
builder2.setCancelable(false);
builder2.setMessage("Easily share this App with all your Android friends. " +
"Help us support Independent, Soul Music and Artists by simply having others scan this bar-code with any Android scan program and download this app. " +
"Share the music and share your love for independent artists around the world.");
builder2.setNegativeButton("Close", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
//if user selects "No", cancel this dialog and continue with the app
dialog.cancel();
Toast.makeText(MainActivity.this, "Thank you for sharing the Music.", Toast.LENGTH_SHORT).show();
}
});
AlertDialog alert = builder2.create();
alert.show();
}
protected void goToEmail() {
Intent i = new Intent(Intent.ACTION_SEND);
i.setType("message/rfc822");
i.putExtra(Intent.EXTRA_EMAIL, new String[]{"[email protected]"});
i.putExtra(Intent.EXTRA_SUBJECT, "I LOVE THIS STATION!!!");
i.putExtra(Intent.EXTRA_TEXT, "");
try {
startActivity(Intent.createChooser(i, "Send mail..."));
} catch (android.content.ActivityNotFoundException ex) {
Toast.makeText(MainActivity.this, "There are no email clients installed.", Toast.LENGTH_SHORT).show();
}
}
protected void goToShare() {
Intent sharingIntent = new Intent(Intent.ACTION_SEND);
sharingIntent.setType("text/plain");
String shareBody = "https://play.google.com/store/apps/details?id=w1r.wilder1radio";
sharingIntent.putExtra(Intent.EXTRA_SUBJECT, "You'll Love This App!!!");
sharingIntent.putExtra(Intent.EXTRA_TEXT, shareBody);
startActivity(Intent.createChooser(sharingIntent, "Share via"));
}
//top nav buttons
protected void sendToNavFaceBook() {
String url = "https://www.facebook.com/pages/Wilder1Radio/125698310843952";
Intent in = new Intent(Intent.ACTION_VIEW);
in.setData(Uri.parse(url));
startActivity(in);
}
protected void sendToNavTwitter() {
String url = "https://twitter.com/Wilder1Radio";
Intent in = new Intent(Intent.ACTION_VIEW);
in.setData(Uri.parse(url));
startActivity(in);
mp.pause();
}
protected void sendToNavGooglePlus() {
String url = "https://plus.google.com/u/0/107138907547512605174";
Intent in = new Intent(Intent.ACTION_VIEW);
in.setData(Uri.parse(url));
startActivity(in);
}
//Close App Alert
@Override
public void onBackPressed() {
//Opens alert message when back button is pressed when in main view
backButtonControl();
}
public void backButtonControl() {
AlertDialog.Builder alertDialog = new AlertDialog.Builder(
MainActivity.this);
//Dialog Title
alertDialog.setTitle("Closing W1R App");
//Dialog Message
alertDialog.setMessage("Ready to go off the air?");
//Add Icon to Dialog
alertDialog.setIcon(R.drawable.w1ricon);
//"Yes" Button
alertDialog.setPositiveButton("YES",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
//If YES, close app completely
finish();
}
});
//"NO" Button
alertDialog.setNegativeButton("NO",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
//If NO, show toast and close alert only
dialog.cancel();
Toast.makeText(MainActivity.this, "Thank you for your support", Toast.LENGTH_SHORT).show();
}
});
//Showing Alert Message
alertDialog.show();
}
@Override
public void onResume() {
super.onResume(); // Always call the superclass method first
// Play again, tough be carefull in the beggining for null pointers
}
@Override
public void onPause() {
super.onPause(); // Always call the superclass method first
// Stop playing, we are paused. Phone call, ...
}
@Override
protected void onStop() {
super.onDestroy();
if(mp!=null){
if(mp.isPlaying()){
mp.stop();
}
mp.release();
mp = null;
}
}
}
您需要覆盖两种方法
@Override
public void onResume() {
super.onResume(); // Always call the superclass method first
// Play again, tough be carefull in the beggining for null pointers
}
@Override
public void onPause() {
super.onPause(); // Always call the superclass method first
// Stop playing, we are paused. Phone call, ...
}