android 启动错误
0
[已解决问题]
解决于 2017-10-01 15:18
错误如下：
09-30 13:40:05.042 4628-4628/com.lyf.ai.demo E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.lyf.ai.demo, PID: 4628
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.lyf.ai.demo/com.lyf.ai.demo.MainActivity}: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.lyf.ai.demo/com.lyf.ai.demo.ActivityOne}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ListView.setAdapter(android.widget.ListAdapter)' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2665)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
Caused by: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.lyf.ai.demo/com.lyf.ai.demo.ActivityOne}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ListView.setAdapter(android.widget.ListAdapter)' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2665)
at android.app.ActivityThread.startActivityNow(ActivityThread.java:2465)
at android.app.LocalActivityManager.moveToState(LocalActivityManager.java:136)
at android.app.LocalActivityManager.startActivity(LocalActivityManager.java:348)
at android.widget.TabHost$IntentContentStrategy.getContentView(TabHost.java:724)
at android.widget.TabHost.setCurrentTab(TabHost.java:388)
at android.widget.TabHost.addTab(TabHost.java:222)
at com.lyf.ai.demo.MainActivity.initView(MainActivity.java:47)
at com.lyf.ai.demo.MainActivity.onCreate(MainActivity.java:25)
at android.app.Activity.performCreate(Activity.java:6679)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2618)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ListView.setAdapter(android.widget.ListAdapter)' on a null object reference
at com.lyf.ai.demo.ActivityOne.onCreate(ActivityOne.java:43)
at android.app.Activity.performCreate(Activity.java:6679)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2618)
at android.app.ActivityThread.startActivityNow(ActivityThread.java:2465)
at android.app.LocalActivityManager.moveToState(LocalActivityManager.java:136)
at android.app.LocalActivityManager.startActivity(LocalActivityManager.java:348)
at android.widget.TabHost$IntentContentStrategy.getContentView(TabHost.java:724)
at android.widget.TabHost.setCurrentTab(TabHost.java:388)
at android.widget.TabHost.addTab(TabHost.java:222)
at com.lyf.ai.demo.MainActivity.initView(MainActivity.java:47)
at com.lyf.ai.demo.MainActivity.onCreate(MainActivity.java:25)
at android.app.Activity.performCreate(Activity.java:6679)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2618)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
最佳答案
0
加载页面有误，建议查看setContentView(R.layout.activity_login);
奖励园豆：5
