`import android.support.v4.view.ViewPager;
public class Home extends Activity {
private ViewPager mainViewPager;
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.home);
mainViewPager = (ViewPager) findViewById(R.id.home_vp_pager); //the log will redirect me from DDMS to this line.
}
}
`
我的应用在通过OTA更新我的应用时遇到崩溃。这是我的错误日志
引起:java.lang.ClassCastException:android.support.v4.view.ViewPager无法强制转换为android.support.v4.view.ViewPager
12-26 16:47:43.067:E / AndroidRuntime(3821):在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2572) 12-26 16:47:43.067:E / AndroidRuntime(3821):在android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2654) 12-26 16:47:43.067:E / AndroidRuntime(3821):在android.app.ActivityThread.-wrap11(ActivityThread.java) 12-26 16:47:43.067:E / AndroidRuntime(3821):在android.app.ActivityThread $ H.handleMessage(ActivityThread.java:1488) 12-26 16:47:43.067:E / AndroidRuntime(3821):在android.os.Handler.dispatchMessage(Handler.java:111) 12-26 16:47:43.067:E / AndroidRuntime(3821):在android.os.Looper.loop(Looper.java:207) 12-26 16:47:43.067:E / AndroidRuntime(3821):在android.app.ActivityThread.main(ActivityThread.java:5728) 12-26 16:47:43.067:E / AndroidRuntime(3821):at java.lang.reflect.Method.invoke(Native Method) 12-26 16:47:43.067:E / AndroidRuntime(3821):at com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:789) 12-26 16:47:43.067:E / AndroidRuntime(3821):at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:679) 12-26 16:47:43.067:E / AndroidRuntime(3821):引起:java.lang.ClassCastException:android.support.v4.view.ViewPager无法强制转换为android.support.v4.view.ViewPager 12-26 16:47:43.067:E / AndroidRuntime(3821):at com.android.home.Home.onCreate(Home.java:445) 12-26 16:47:43.067:E / AndroidRuntime(3821):在android.app.Activity.performCreate(Activity.java:6309) 12-26 16:47:43.067:E / AndroidRuntime(3821):在android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1113) 12-26 16:47:43.067:E / AndroidRuntime(3821):在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2519) 12-26 16:47:43.067:E / AndroidRuntime(3821):... 9更多
我正在使用
机器人支撑-v4.jar
甚至我的应用也反复显示此错误
新更新:
我正在使用
'compileSdkVersion 27
buildToolsVersion '27.0.3'
defaultconfig{
......
minSdkVersion 19
targetSdkVersion 21
....
}
.................
dependencies {
implementation fileTree(include: ['*.jar'], dir: 'libs')
implementation 'com.android.support:support-v4:27.1.1'
}'
答案 0 :(得分:0)
尝试扩展AppCompatActivity而不是Activity