Android ActivityNotFoundException當我開始我的活動

Question

我試圖通過意圖從一個活動發送數據到另一個。但面臨強制關閉錯誤button click。

第一活動：

btn1= (Button) findViewById(R.id.Next); 
et = (EditText) findViewById(R.id.edit); 
btn1.setOnClickListener(new Button.OnClickListener(){ 
    public void onClick(View v) 
    { 
     Intent intent = new Intent(); 
     intent.setClass(ViewchangerActivity.this, DisplayActivity.class); 
     intent.putExtra("Name", et.getText().toString()); 

     startActivity(intent); 
    } 
}); 

---

第二活動：

public void onCreate(Bundle savedinstanceState) 
    { 
     super.onCreate(savedinstanceState); 
     setContentView(R.layout.main2); 
     TextView tv = (TextView) findViewById(R.id.Name); 
     Bundle b = getIntent().getExtras(); 
     String str =b.getString("Name"); 

     tv.setText(str); 
    } 

---

logcat的：

android.content.ActivityNotFoundException: Unable to find explicit activity class 
{org.android/org.android.DisplayActivity}; have you declared this activity in your AndroidManifest.xml? 

Answer 1

確保您註冊DisplayActivity在Manifast.xml爲：

<activity android:name=".DisplayActivity"></activity> 

和PLZ Eclipse的IDE

Answer 2

從項目 - >清理清理項目...您的活動未添加到清單中..........

<activity android:name=".DisplayActivity"></activity>