java - Android Intent 不开始新 Activity ？

Question

我想在这里做一些相当简单的事情，只需从我的主要 Activity 中启动一个新 Activity 。这是代码:

public class mainActivity extends Activity {

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);


    Intent i = new Intent(mainActivity.this, testActivity.class);  
    startService(i);
}

///////////////// next file /////////////////

public class testActivity extends Activity {

@Override 
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.test);

    Toast.makeText(this, "testActivity started", Toast.LENGTH_SHORT).show();

}

///////////////// manifest section ///////////////////

<application android:icon="@drawable/icon" android:label="@string/app_name">
    <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=".testActivity" />

但我从未在 testActivity 中看到 Toast - 是什么原因？

Answer 1

您想使用 startActivity 而不是 startService

Intent i = new Intent(mainActivity.this, testActivity.class);  
startActivity(i);