java - 未找到处理类文件中 Intent 的 Activity

Question

我对 Android 还很陌生。我正在学习如何在 Activity 中传递 Intent 。这是我在两个 Activity 之间传递 Intent 的代码。

1. MainActivity.java

   public class MainActivity extends ActionBarActivity {
   
   @Override
   protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_main);
   
   Button b1 = (Button)findViewById(R.id.btOk);
   b1.setOnClickListener(new View.OnClickListener() {
       @Override
       public void onClick(View v) {
           EditText etName = (EditText)findViewById(R.id.etName);
           String Data = etName.getText().toString();
   
           Intent i = new Intent("com.adhish.passingintentdata.layout2");
           Bundle extras = new Bundle();
           extras.putString("Name", Data);
           i.putExtras(extras);
           startActivityForResult(i,1);
       }
   });
   }
   

2. layout2.java

   public class layout2 extends ActionBarActivity {
   @Override
   protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_layout2);
   
   String myName = null;
   Bundle extras = getIntent().getExtras();
   if(extras != null)
   {
       myName = extras.getString("Name");
   }
   
   TextView tvData = (TextView)findViewById(R.id.tvData);
   tvData.setText(myName);
   }
   }
   

3. Manifest.xml

   <application
   android:allowBackup="true"
   android:icon="@mipmap/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=".layout2"
       android:label="@string/title_activity_layout2"
       android:parentActivityName=".MainActivity" >
       <meta-data
           android:name="android.support.PARENT_ACTIVITY"
           android:value="com.adhish.passingintentdata.MainActivity" />
   </activity>
   

当我运行此代码并单击“确定”按钮传递数据时，我的应用程序因 fatal error 而崩溃。

错误是:

android.content.ActivityNotFoundException: No Activity found to handle Intent { act=com.adhish.passingintentdata.layout2 (has extras) }

请为我提供有关解决此问题的详细帮助，因为我是 Android 新手。

谢谢。

Answer 1

使用com.adhish.passingintentdata.MainActivity作为Action字符串来创建Intent来启动layout2 Activity:

    Intent i = new Intent("com.adhish.passingintentdata.layout2");

并在 Manifast 中为layout2 Activity 添加 Intent 过滤器:

<intent-filter>
        <action android:name="com.adhish.passingintentdata.layout2" /> 
 </intent-filter>