Question

大家好我有这个问题。我实际上需要在android应用程序上添加两个选项卡，我正在阅读如何在developer.android.com中执行此操作，但我无法运行该程序

这是mi代码：

package com.example.example;

import android.os.Bundle;
import android.app.ActionBar;
import android.app.Activity;
import android.app.FragmentTransaction;
import android.app.ActionBar.Tab;
import android.view.Menu;

public class MainActivity extends Activity {

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

         final ActionBar actionBar = getActionBar();

         actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);

         ActionBar.TabListener tabListener = new ActionBar.TabListener() {


            @Override
            public void onTabUnselected(Tab tab, FragmentTransaction ft) {
                // TODO Auto-generated method stub

            }

            @Override
            public void onTabSelected(Tab tab, FragmentTransaction ft) {
                // TODO Auto-generated method stub

            }

            @Override
            public void onTabReselected(Tab tab, FragmentTransaction ft) {
                // TODO Auto-generated method stub

            }
        };

         // Add 3 tabs, specifying the tab's text and TabListener
        for (int i = 0; i < 3; i++) {
            actionBar.addTab(
                    actionBar.newTab()
                            .setText("Tab " + (i + 1))
                            .setTabListener(tabListener));
        }


    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

}

这是编译错误：

02-23 16:09:20.164: E/AndroidRuntime(23928): FATAL EXCEPTION: main
02-23 16:09:20.164: E/AndroidRuntime(23928): java.lang.NoSuchMethodError: com.example.example.MainActivity.getActionBar
02-23 16:09:20.164: E/AndroidRuntime(23928):    at com.example.example.MainActivity.onCreate(MainActivity.java:17)
02-23 16:09:20.164: E/AndroidRuntime(23928):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1082)
02-23 16:09:20.164: E/AndroidRuntime(23928):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1698)
02-23 16:09:20.164: E/AndroidRuntime(23928):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1753)
02-23 16:09:20.164: E/AndroidRuntime(23928):    at android.app.ActivityThread.access$1500(ActivityThread.java:155)
02-23 16:09:20.164: E/AndroidRuntime(23928):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:999)
02-23 16:09:20.164: E/AndroidRuntime(23928):    at android.os.Handler.dispatchMessage(Handler.java:130)
02-23 16:09:20.164: E/AndroidRuntime(23928):    at android.os.Looper.loop(SourceFile:351)
02-23 16:09:20.164: E/AndroidRuntime(23928):    at android.app.ActivityThread.main(ActivityThread.java:3820)
02-23 16:09:20.164: E/AndroidRuntime(23928):    at java.lang.reflect.Method.invokeNative(Native Method)
02-23 16:09:20.164: E/AndroidRuntime(23928):    at java.lang.reflect.Method.invoke(Method.java:538)
02-23 16:09:20.164: E/AndroidRuntime(23928):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:969)
02-23 16:09:20.164: E/AndroidRuntime(23928):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:727)
02-23 16:09:20.164: E/AndroidRuntime(23928):    at dalvik.system.NativeStart.main(Native Method)

我认为问题出在manifest.xml中，因为当我尝试插入这两行时：

actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS)
ActionBar.TabListener tabListener = new ActionBar.TabListener() {

日食给我看了一个错误，上面写着“minium sdk应该是11而你的minium sdk是8”

然后我在manifest.xml中更改它，menssage错误消失，但我无法在手机上运行它

这里是mi android_manifest.mxl：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.example"
    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.example.example.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>
    </application>

</manifest>

Answer 1

您应该使用support库在运行SO版本低于API 11的设备中使用ActionBar。

看看如何Setup Support Library。

要使用ActionBar，您应该致电：

final ActionBar actionBar = geSupportActionBar();

为确保一切正常，您必须import android.support.v7.app.ActionBar。

我无法在android上运行非常简单的标签示例

1 个答案: