Question

我试过实现简单的东西来启动imagebutton上的新活动点击“Dealsofday”是我的imagebutton名称... 这是我的 1）mainactiviy.java

public class MainActivity extends Activity {

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

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.activity_main, menu);
    return true;
}

public void addListenerOnButtondod() {

    final Context context = this;

    ImageButton btndod = (ImageButton) findViewById(R.id.Dealsofday);

    btndod.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {

            Intent intent = new Intent(context,Spldeals.class);
            startActivity(intent);   

        }

    });
}

}

2）Spldeals.java如下

public class Spldeals extends Activity {

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_spldeals);
    getActionBar().setDisplayHomeAsUpEnabled(true);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.activity_spldeals, menu);
    return true;
}


@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
        case android.R.id.home:
            NavUtils.navigateUpFromSameTask(this);
            return true;
    }
    return super.onOptionsItemSelected(item);
}

}

我的日志如下所示

03-08 00:22:38.697: D/dalvikvm(477): GC_EXTERNAL_ALLOC freed 678 objects / 52432 bytes in 87ms
03-08 00:22:42.777: I/dalvikvm(477): Could not find method com.example.test.Spldeals.getActionBar, referenced from method com.example.test.Spldeals.onCreate
03-08 00:22:42.777: W/dalvikvm(477): VFY: unable to resolve virtual method 3320: Lcom/example/test/Spldeals;.getActionBar ()Landroid/app/ActionBar;
03-08 00:22:42.788: D/dalvikvm(477): VFY: replacing opcode 0x6e at 0x0009
03-08 00:22:42.797: D/dalvikvm(477): VFY: dead code 0x000c-0011 in Lcom/example/test/Spldeals;.onCreate (Landroid/os/Bundle;)V
03-08 00:22:42.878: D/AndroidRuntime(477): Shutting down VM
03-08 00:22:42.878: W/dalvikvm(477): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
03-08 00:22:42.897: E/AndroidRuntime(477): FATAL EXCEPTION: main
03-08 00:22:42.897: E/AndroidRuntime(477): java.lang.NoSuchMethodError: com.example.test.Spldeals.getActionBar
03-08 00:22:42.897: E/AndroidRuntime(477):  at com.example.test.Spldeals.onCreate(Spldeals.java:15)
03-08 00:22:42.897: E/AndroidRuntime(477):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
03-08 00:22:42.897: E/AndroidRuntime(477):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
03-08 00:22:42.897: E/AndroidRuntime(477):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
03-08 00:22:42.897: E/AndroidRuntime(477):  at android.app.ActivityThread.access$2300(ActivityThread.java:125)
03-08 00:22:42.897: E/AndroidRuntime(477):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
03-08 00:22:42.897: E/AndroidRuntime(477):  at android.os.Handler.dispatchMessage(Handler.java:99)
03-08 00:22:42.897: E/AndroidRuntime(477):  at android.os.Looper.loop(Looper.java:123)
03-08 00:22:42.897: E/AndroidRuntime(477):  at android.app.ActivityThread.main(ActivityThread.java:4627)
03-08 00:22:42.897: E/AndroidRuntime(477):  at java.lang.reflect.Method.invokeNative(Native Method)
03-08 00:22:42.897: E/AndroidRuntime(477):  at java.lang.reflect.Method.invoke(Method.java:521)
03-08 00:22:42.897: E/AndroidRuntime(477):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
03-08 00:22:42.897: E/AndroidRuntime(477):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
03-08 00:22:42.897: E/AndroidRuntime(477):  at dalvik.system.NativeStart.main(Native Method)

第一个屏幕可以正常加载但是当我点击图像按钮（Dealsofday）时，应用会意外停止请帮忙。

Answer 1

getActionBar().setDisplayHomeAsUpEnabled(true);

您正试图在不存在ActionBar的Android版本上运行您的应用，该版本低于API 11。

Answer 2

如果您的android:minSdkVersion低于11，则方法getActionBar()不可用，因此请尝试设置AndroidManifest.xml android:minSdkVersion=11或更高。

方法getActionBar()仅在API 11之后可用。

在图像按钮上单击启动活动

2 个答案: