android - 主线程中的工作太多，应用程序卡住

Question

在这里，我调用了一个 Activity ，它是一个聊天应用程序。

猫日志:

02-26 12:30:38.996: I/Choreographer(807): Skipped 35 frames!  The application may be doing too much work on its main thread.
02-26 12:30:39.196: I/Choreographer(807): Skipped 31 frames!  The application may be doing too much work on its main thread.
02-26 12:30:39.516: I/Choreographer(807): Skipped 31 frames!  The application may be doing too much work on its main thread.
02-26 12:30:39.996: I/Choreographer(807): Skipped 32 frames!  The application may be doing too much work on its main thread.
02-26 12:30:40.066: I/Choreographer(807): Skipped 37 frames!  The application may be doing too much work on its main thread.
02-26 12:30:40.207: I/Choreographer(807): Skipped 33 frames!  The application may be doing too much work on its main thread.
02-26 12:30:40.896: I/Choreographer(807): Skipped 33 frames!  The application may be doing too much work on its main thread.
02-26 12:30:41.586: I/Choreographer(807): Skipped 30 frames!  The application may be doing too much work on its main thread.
02-26 12:30:42.266: I/Choreographer(807): Skipped 30 frames!  The application may be doing too much work on its main thread.
02-26 12:30:42.486: I/Choreographer(807): Skipped 31 frames!  The application may be doing too much work on its main thread.
02-26 12:30:42.556: I/Choreographer(807): Skipped 37 frames!  The application may be doing too much work on its main thread.
02-26 12:30:42.826: I/Choreographer(807): Skipped 32 frames!  The application may be doing too much work on its main thread.
02-26 12:30:43.316: I/Choreographer(807): Skipped 30 frames!  The application may be doing too much work on its main thread.
02-26 12:30:43.777: I/Choreographer(807): Skipped 30 frames!  The application may be doing too much work on its main thread.
02-26 12:30:43.826: I/Choreographer(807): Skipped 32 frames!  The application may be doing too much work on its main thread.
02-26 12:30:43.866: I/Choreographer(807): Skipped 34 frames!  The application may be doing too much work on its main thread.
.   .      .   .      .  
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.   .      .   .      .

这就是我从 MainActivity 启动 Activity 的方式:

public class MainActivity extends Activity {
     Handler handler;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    Button b = (Button) findViewById(R.id.button1);
     handler = new Handler(Looper.getMainLooper());


    b.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            final  Intent i = new Intent(com.example.mainactivity.MainActivity.this,com.quickblox.sample.chat.ui.activities.SplashActivity.class);
             handler.post(new Runnable() {
                    @Override
                    public void run() {
                        startActivity(i);
                    }
                });

我怎样才能防止这种情况，应用程序在调用 Activity 后挂起。有什么问题吗？

更新:

飞溅 Activity :

public class SplashActivity extends Activity implements QBCallback {

    private static final String APP_ID = "7467";
    private static final String AUTH_KEY = "TxRFWfX8tTXQ4gv";
    private static final String AUTH_SECRET = "y-QJrO2j69VTaCs";

    private ProgressBar progressBar;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_splash);

        progressBar = (ProgressBar) findViewById(R.id.progressBar);

        QBSettings.getInstance().fastConfigInit(APP_ID, AUTH_KEY, AUTH_SECRET);
        QBAuth.createSession(this);
    }

    @Override
    public void onComplete(Result result) {
        progressBar.setVisibility(View.GONE);

        if (result.isSuccess()) {
            Intent intent = new Intent(this, MainActivity.class);
            startActivity(intent);
            finish();
        } else {
            AlertDialog.Builder dialog = new AlertDialog.Builder(this);
            dialog.setMessage("Error(s) occurred. Look into DDMS log for details, " +
                    "please. Errors: " + result.getErrors()).create().show();
        }
    }

    @Override
    public void onComplete(Result result, Object context) {
    }
}

更新:

您可以在 this 中找到详细信息线程。

Answer 1

startActivity(i); 只需向系统发送一个 Intent。所以你不需要在单独的线程中启动 Activity 。

相反，您应该在另一个线程中通过 SplashActivity onCreate 方法完成所有艰苦的工作。

public class MainActivity extends Activity {
//...
 @Override
 protected void onCreate(Bundle savedInstanceState) {
   //...
   final  Intent intent = new Intent(this,SplashActivity.class);
   startActivity(intent);
 }
}

public class SplashActivity extends Activity {
//...
 @Override
 protected void onCreate(Bundle savedInstanceState) {
   //...
   new Thread(new Runnable()
   {
     @Override
     public void run() {
      //do loading data or whatever hard here

      runOnUiThread(new Runnable(){
        @Override
        public void run() {
          //..update your UI here
        }
      });
     }
   }).start();
 }
}

请记住，您只能在主 Android(通常称为 UI)线程上更新您的 UI。

我建议您的 QBAuth.createSession(this); 正在打开某种 Http 连接，这就是您的应用程序卡住的原因。将其移至单独的线程。

更新:

public class SplashActivity extends Activity{

private static final String APP_ID = "7467";
private static final String AUTH_KEY = "TxRFWfX8tTXQ4gv";
private static final String AUTH_SECRET = "y-QJrO2j69VTaCs";

public static class QBAuth{
    private static QBCallback mQBCallback;

    public static void createSession(QBCallback qbCallback) {
        // do request initialization
        mQBCallback = qbCallback;
    }
}

public interface QBCallback{
    public void onComplete(Result result);
    public void onComplete(Result result, Object context);
}

public class Result{
    boolean isSuccess;
    String errors;

    public boolean isSuccess() {
        return isSuccess;
    }

    public void setSuccess(boolean isSuccess) {
        this.isSuccess = isSuccess;
    }

    public String getErrors() {
        return errors;
    }

    public void setErrors(String errors) {
        this.errors = errors;
    }
}

private ProgressBar progressBar;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_splash);

    progressBar = (ProgressBar) findViewById(R.id.progressBar);


    new Thread(new Runnable() {
        @Override
        public void run() {
            QBSettings.getInstance().fastConfigInit(APP_ID, AUTH_KEY, AUTH_SECRET);
            QBAuth.createSession(mQBCallback);
        }
    });
}


private QBCallback mQBCallback = new QBCallback() {
    @Override
    public void onComplete(Result result) {
        handleResult(result);
    }

    @Override
    public void onComplete(Result result, Object context) {

    }
};

private void handleResult(final Result result) {
    runOnUiThread(new Runnable() {
        @Override
        public void run() {
            progressBar.setVisibility(View.GONE);

            if (result.isSuccess()) {
                Intent intent = new Intent(SplashActivity.this, MainActivity.class);
                startActivity(intent);
                finish();
            } else {
                AlertDialog.Builder dialog = new AlertDialog.Builder(SplashActivity.this);
                dialog.setMessage("Error(s) occurred. Look into DDMS log for details, " +
                        "please. Errors: " + result.getErrors()).create().show();
            }
        }
    });
}
}