我正在使用線程概念,即當我的應用程序加載它時,顯示圖片3秒,然後加載活動。 但我得到一個活動未發現異常使用意圖啓動新活動時發生活動未發現異常
WelcomeScreen-1活性(負載並停留3secs) MainActivity-2號活性的SHLD開始計時後。(拋出錯誤說不幸的是停止)。 我對Android完全陌生,這是我第一個應用程序。請不要重複。 由於提前
WelcomeScreen代碼:
public class WelcomeScreen extends Activity{
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.welcomescreen);
Thread thread=new Thread(){
public void run(){
try{
sleep(3000);
}catch(InterruptedException e){
e.printStackTrace();
}finally{
Intent startMainActivity = new Intent("com.thenewboston.helloworld.MainActivity");
startActivity(startMainActivity);
}
}
};thread.start();
}
}
MainActivity代碼:
public class MainActivity extends ActionBarActivity {
int counter;
Button add, sub;
TextView displayTxt;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
counter=0;
add=(Button) findViewById(R.id.addButton);
sub=(Button) findViewById(R.id.subButton);
displayTxt=(TextView) findViewById(R.id.textView1);
add.setOnClickListener(new View.OnClickListener(
) {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
counter++;
displayTxt.setText("Your Count is "+counter);
}
});
sub.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
counter--;
displayTxt.setText("Your Count is "+counter);
}
});
}
Android清單:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.thenewboston.helloworld"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="19" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.thenewboston.helloworld.WelcomeScreen"
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="com.thenewboston.helloworld.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
</application>
</manifest>
logcat的日誌:
11-08 12:55:03.172: D/dalvikvm(1994): GC_FOR_ALLOC freed 58K, 5% free 2891K/3032K, paused 58ms, total 61ms
11-08 12:55:03.172: I/dalvikvm-heap(1994): Grow heap (frag case) to 8.050MB for 5404816-byte allocation
11-08 12:55:03.242: D/dalvikvm(1994): GC_FOR_ALLOC freed 2K, 2% free 8166K/8312K, paused 63ms, total 63ms
11-08 12:55:04.462: D/gralloc_goldfish(1994): Emulator without GPU emulation detected.
11-08 12:55:07.152: W/dalvikvm(1994): threadid=11: thread exiting with uncaught exception (group=0xb2a9aba8)
11-08 12:55:07.172: E/AndroidRuntime(1994): FATAL EXCEPTION: Thread-129
11-08 12:55:07.172: E/AndroidRuntime(1994): Process: com.thenewboston.helloworld, PID: 1994
11-08 12:55:07.172: E/AndroidRuntime(1994): android.content.ActivityNotFoundException: No Activity found to handle Intent { act=com.thenewboston.helloworld.MAINACTIVITY }
11-08 12:55:07.172: E/AndroidRuntime(1994): at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1632)
11-08 12:55:07.172: E/AndroidRuntime(1994): at android.app.Instrumentation.execStartActivity(Instrumentation.java:1424)
11-08 12:55:07.172: E/AndroidRuntime(1994): at android.app.Activity.startActivityForResult(Activity.java:3424)
11-08 12:55:07.172: E/AndroidRuntime(1994): at android.app.Activity.startActivityForResult(Activity.java:3385)
11-08 12:55:07.172: E/AndroidRuntime(1994): at android.app.Activity.startActivity(Activity.java:3627)
11-08 12:55:07.172: E/AndroidRuntime(1994): at android.app.Activity.startActivity(Activity.java:3595)
11-08 12:55:07.172: E/AndroidRuntime(1994): at com.thenewboston.helloworld.WelcomeScreen$1.run(WelcomeScreen.java:22)
輝煌!它非常感謝你 – Rags 2014-11-08 18:05:44