我該如何擺脫「跳過的幀，應用程序可能在它的主線程上做了太多的工作」錯誤

Question

我想運行構建我的應用程序的第一個示例，並且在從主活動。從System.out消息中，我可以看到sendMessage()方法由發送按鈕的onClick調用，但顯示消息活動永遠不會被調用。

的logcat中有這樣的消息 -

"03-20 08:56:52.278: I/Choreographer(868): Skipped 66 frames! The application may be doing too much work on its main thread." 

這會打印，直到我殺掉模擬器。

這是內存問題嗎？我正在使用4G Ram PC。

MainActivity.java 

    package com.example.firstproject; 

    import android.os.Bundle; 
    import android.app.Activity; 
    import android.content.Intent; 
    import android.view.Menu; 
    import android.view.View; 
    import android.widget.EditText; 
    import com.example.firstproject.DisplayMessageActivity; 

    public class MainActivity extends Activity { 
    public final static String EXTRA_MESSAGE = "com.example.firstproject.MESSAGE"; 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
    } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     // Inflate the menu; this adds items to the action bar if it is present. 
     getMenuInflater().inflate(R.menu.main, menu); 
     return true; 
    } 

    /** Called when the user clicks the Send button */ 
    public void sendMessage(View view) { // Do something in response to button 
     System.out.println("Send message is called"); 
     Intent intent = new Intent(this, DisplayMessageActivity.class); 
     EditText editText = (EditText) findViewById(R.id.edit_message); 
     String message = editText.getText().toString(); 
     intent.putExtra(EXTRA_MESSAGE, message); 
     System.out.println("message =" + message); 
    } 

} 


DisplayMessageActivity.java 
---------------------------- 

    package com.example.firstproject; 

    import android.os.Bundle; 
    import android.app.Activity; 
    import android.view.Menu; 
    import android.view.MenuItem; 
    import android.widget.TextView; 
    import android.support.v4.app.NavUtils; 
    import android.annotation.SuppressLint; 
    import android.annotation.TargetApi; 
    import android.content.Intent; 
    import android.os.Build; 

    public class DisplayMessageActivity extends Activity { 
    @SuppressLint("NewApi") 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     System.out.println("Hi Display is called"); 
     super.onCreate(savedInstanceState); 
     // Get the message from the intent 
     Intent intent = getIntent(); 
     String message = intent.getStringExtra(MainActivity.EXTRA_MESSAGE); 
     // Create the text view 
     TextView textView = new TextView(this); 
     textView.setTextSize(40); 
     textView.setText(message); 
     // Set the text view as the activity layout 
     setContentView(textView); 
    } 


    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     switch (item.getItemId()) { 
     case android.R.id.home: 

      NavUtils.navigateUpFromSameTask(this); 
      return true; 
     } 
     return super.onOptionsItemSelected(item); 
    } 

} 

AndroidManifest file 


<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
    package="com.example.firstproject" 
    android:versionCode="1" 
    android:versionName="1.0" > 

    <uses-sdk 
     android:minSdkVersion="8" /> 

    <application 
     android:allowBackup="true" 
     android:icon="@drawable/ic_launcher" 
     android:label="@string/app_name" 
     android:theme="@style/AppTheme" > 
     <activity 
      android:name=".MainActivity" 
      android:label="@string/app_name" > 
      <intent-filter> 
       <action android:name="android.intent.action.MAIN" /> 
       <category android:name="android.intent.category.LAUNCHER" /> 
      </intent-filter> 
     </activity> 
     <activity 
      android:name=".DisplayMessageActivity" 
      android:label="@string/title_activity_display_message" 
      android:parentActivityName=".MainActivity" > 
      <meta-data 
       android:name="android.support.PARENT_ACTIVITY" 
       android:value=".MainActivity" /> 
     </activity> 
    </application> 

</manifest> 

任何幫助表示讚賞。

Answer 1

看來你忘了實際開始DisplayMessageActivity;在MainActivity.sendMesssage()中加startActivity(intent)。另見this。