有关android疯狂讲义！！速来大神

Question

03-23 07:02:52.352: E/AndroidRuntime(531): FATAL EXCEPTION: main
03-23 07:02:52.352: E/AndroidRuntime(531): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.lab4/com.example.lab4.MainActivity}: android.util.AndroidRuntimeException: requestFeature() must be called before adding content
03-23 07:02:52.352: E/AndroidRuntime(531):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956)
03-23 07:02:52.352: E/AndroidRuntime(531):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
03-23 07:02:52.352: E/AndroidRuntime(531):  at android.app.ActivityThread.access$600(ActivityThread.java:123)
03-23 07:02:52.352: E/AndroidRuntime(531):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
03-23 07:02:52.352: E/AndroidRuntime(531):  at android.os.Handler.dispatchMessage(Handler.java:99)
03-23 07:02:52.352: E/AndroidRuntime(531):  at android.os.Looper.loop(Looper.java:137)
03-23 07:02:52.352: E/AndroidRuntime(531):  at android.app.ActivityThread.main(ActivityThread.java:4424)
03-23 07:02:52.352: E/AndroidRuntime(531):  at java.lang.reflect.Method.invokeNative(Native Method)
03-23 07:02:52.352: E/AndroidRuntime(531):  at java.lang.reflect.Method.invoke(Method.java:511)
03-23 07:02:52.352: E/AndroidRuntime(531):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
03-23 07:02:52.352: E/AndroidRuntime(531):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
03-23 07:02:52.352: E/AndroidRuntime(531):  at dalvik.system.NativeStart.main(Native Method)
03-23 07:02:52.352: E/AndroidRuntime(531): Caused by: android.util.AndroidRuntimeException: requestFeature() must be called before adding content
03-23 07:02:52.352: E/AndroidRuntime(531):  at com.android.internal.policy.impl.PhoneWindow.requestFeature(PhoneWindow.java:210)
03-23 07:02:52.352: E/AndroidRuntime(531):  at android.app.Activity.requestWindowFeature(Activity.java:3083)
03-23 07:02:52.352: E/AndroidRuntime(531):  at com.example.lab4.MainActivity.onCreate(MainActivity.java:19)
03-23 07:02:52.352: E/AndroidRuntime(531):  at android.app.Activity.performCreate(Activity.java:4465)
03-23 07:02:52.352: E/AndroidRuntime(531):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
03-23 07:02:52.352: E/AndroidRuntime(531):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
03-23 07:02:52.352: E/AndroidRuntime(531):  ... 11 more
03-23 07:03:13.995: E/AndroidRuntime(548): FATAL EXCEPTION: main
03-23 07:03:13.995: E/AndroidRuntime(548): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.lab4/com.example.lab4.MainActivity}: android.util.AndroidRuntimeException: requestFeature() must be called before adding content
03-23 07:03:13.995: E/AndroidRuntime(548):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956)
03-23 07:03:13.995: E/AndroidRuntime(548):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
03-23 07:03:13.995: E/AndroidRuntime(548):  at android.app.ActivityThread.access$600(ActivityThread.java:123)
03-23 07:03:13.995: E/AndroidRuntime(548):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
03-23 07:03:13.995: E/AndroidRuntime(548):  at android.os.Handler.dispatchMessage(Handler.java:99)
03-23 07:03:13.995: E/AndroidRuntime(548):  at android.os.Looper.loop(Looper.java:137)
03-23 07:03:13.995: E/AndroidRuntime(548):  at android.app.ActivityThread.main(ActivityThread.java:4424)
03-23 07:03:13.995: E/AndroidRuntime(548):  at java.lang.reflect.Method.invokeNative(Native Method)
03-23 07:03:13.995: E/AndroidRuntime(548):  at java.lang.reflect.Method.invoke(Method.java:511)
03-23 07:03:13.995: E/AndroidRuntime(548):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
03-23 07:03:13.995: E/AndroidRuntime(548):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
03-23 07:03:13.995: E/AndroidRuntime(548):  at dalvik.system.NativeStart.main(Native Method)
03-23 07:03:13.995: E/AndroidRuntime(548): Caused by: android.util.AndroidRuntimeException: requestFeature() must be called before adding content
03-23 07:03:13.995: E/AndroidRuntime(548):  at com.android.internal.policy.impl.PhoneWindow.requestFeature(PhoneWindow.java:210)
03-23 07:03:13.995: E/AndroidRuntime(548):  at android.app.Activity.requestWindowFeature(Activity.java:3083)
03-23 07:03:13.995: E/AndroidRuntime(548):  at com.example.lab4.MainActivity.onCreate(MainActivity.java:19)
03-23 07:03:13.995: E/AndroidRuntime(548):  at android.app.Activity.performCreate(Activity.java:4465)
03-23 07:03:13.995: E/AndroidRuntime(548):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
03-23 07:03:13.995: E/AndroidRuntime(548):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
03-23 07:03:13.995: E/AndroidRuntime(548):  ... 11 more
03-23 07:03:19.411: E/AndroidRuntime(562): FATAL EXCEPTION: main
03-23 07:03:19.411: E/AndroidRuntime(562): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.lab4/com.example.lab4.MainActivity}: android.util.AndroidRuntimeException: requestFeature() must be called before adding content
03-23 07:03:19.411: E/AndroidRuntime(562):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956)
03-23 07:03:19.411: E/AndroidRuntime(562):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
03-23 07:03:19.411: E/AndroidRuntime(562):  at android.app.ActivityThread.access$600(ActivityThread.java:123)
03-23 07:03:19.411: E/AndroidRuntime(562):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
03-23 07:03:19.411: E/AndroidRuntime(562):  at android.os.Handler.dispatchMessage(Handler.java:99)
03-23 07:03:19.411: E/AndroidRuntime(562):  at android.os.Looper.loop(Looper.java:137)
03-23 07:03:19.411: E/AndroidRuntime(562):  at android.app.ActivityThread.main(ActivityThread.java:4424)
03-23 07:03:19.411: E/AndroidRuntime(562):  at java.lang.reflect.Method.invokeNative(Native Method)
03-23 07:03:19.411: E/AndroidRuntime(562):  at java.lang.reflect.Method.invoke(Method.java:511)
03-23 07:03:19.411: E/AndroidRuntime(562):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
03-23 07:03:19.411: E/AndroidRuntime(562):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
03-23 07:03:19.411: E/AndroidRuntime(562):  at dalvik.system.NativeStart.main(Native Method)
03-23 07:03:19.411: E/AndroidRuntime(562): Caused by: android.util.AndroidRuntimeException: requestFeature() must be called before adding content
03-23 07:03:19.411: E/AndroidRuntime(562):  at com.android.internal.policy.impl.PhoneWindow.requestFeature(PhoneWindow.java:210)
03-23 07:03:19.411: E/AndroidRuntime(562):  at android.app.Activity.requestWindowFeature(Activity.java:3083)
03-23 07:03:19.411: E/AndroidRuntime(562):  at com.example.lab4.MainActivity.onCreate(MainActivity.java:19)
03-23 07:03:19.411: E/AndroidRuntime(562):  at android.app.Activity.performCreate(Activity.java:4465)
03-23 07:03:19.411: E/AndroidRuntime(562):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
03-23 07:03:19.411: E/AndroidRuntime(562):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
03-23 07:03:19.411: E/AndroidRuntime(562):  ... 11 more

Answer 1

将setContentView那句代码放到requestFeature后面。

Answer 2

[2014-03-23 15:39:39 - lab1] Installation error: INSTALL_FAILED_INSUFFICIENT_STORAGE
[2014-03-23 15:39:39 - lab1] Please check logcat output for more details.
[2014-03-23 15:39:39 - lab1] Launch canceled!再帮我看看这个是怎么回事行么···

Answer 3

http://blog.sina.com.cn/s/blog_5da93c8f0100xngd.html

Answer 4

http://blog.sina.com.cn/s/blog_5da93c8f0100xngd.html
大神你为何这么吊的！！！
能收下我的膝盖么···

Answer 5

http://blog.sina.com.cn/s/blog_5da93c8f0100xngd.html
03-23 16:10:27.918: D/AndroidRuntime(330): Shutting down VM
03-23 16:10:27.918: W/dalvikvm(330): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
03-23 16:10:27.927: E/AndroidRuntime(330): FATAL EXCEPTION: main
03-23 16:10:27.927: E/AndroidRuntime(330): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.lab1/com.example.lab1.MainActivity}: java.lang.ClassCastException: android.widget.RelativeLayout
03-23 16:10:27.927: E/AndroidRuntime(330):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
03-23 16:10:27.927: E/AndroidRuntime(330):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
03-23 16:10:27.927: E/AndroidRuntime(330):  at android.app.ActivityThread.access$2300(ActivityThread.java:125)
03-23 16:10:27.927: E/AndroidRuntime(330):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
03-23 16:10:27.927: E/AndroidRuntime(330):  at android.os.Handler.dispatchMessage(Handler.java:99)
03-23 16:10:27.927: E/AndroidRuntime(330):  at android.os.Looper.loop(Looper.java:123)
03-23 16:10:27.927: E/AndroidRuntime(330):  at android.app.ActivityThread.main(ActivityThread.java:4627)
03-23 16:10:27.927: E/AndroidRuntime(330):  at java.lang.reflect.Method.invokeNative(Native Method)
03-23 16:10:27.927: E/AndroidRuntime(330):  at java.lang.reflect.Method.invoke(Method.java:521)
03-23 16:10:27.927: E/AndroidRuntime(330):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
03-23 16:10:27.927: E/AndroidRuntime(330):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
03-23 16:10:27.927: E/AndroidRuntime(330):  at dalvik.system.NativeStart.main(Native Method)
03-23 16:10:27.927: E/AndroidRuntime(330): Caused by: java.lang.ClassCastException: android.widget.RelativeLayout
03-23 16:10:27.927: E/AndroidRuntime(330):  at com.example.lab1.MainActivity.onCreate(MainActivity.java:23)
03-23 16:10:27.927: E/AndroidRuntime(330):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
03-23 16:10:27.927: E/AndroidRuntime(330):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
03-23 16:10:27.927: E/AndroidRuntime(330):  ... 11 more
03-23 16:11:47.528: D/AndroidRuntime(361): Shutting down VM
03-23 16:11:47.528: W/dalvikvm(361): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
03-23 16:11:47.558: E/AndroidRuntime(361): FATAL EXCEPTION: main
03-23 16:11:47.558: E/AndroidRuntime(361): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.lab1/com.example.lab1.MainActivity}: java.lang.NullPointerException
03-23 16:11:47.558: E/AndroidRuntime(361):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
03-23 16:11:47.558: E/AndroidRuntime(361):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
03-23 16:11:47.558: E/AndroidRuntime(361):  at android.app.ActivityThread.access$2300(ActivityThread.java:125)
03-23 16:11:47.558: E/AndroidRuntime(361):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
03-23 16:11:47.558: E/AndroidRuntime(361):  at android.os.Handler.dispatchMessage(Handler.java:99)
03-23 16:11:47.558: E/AndroidRuntime(361):  at android.os.Looper.loop(Looper.java:123)
03-23 16:11:47.558: E/AndroidRuntime(361):  at android.app.ActivityThread.main(ActivityThread.java:4627)
03-23 16:11:47.558: E/AndroidRuntime(361):  at java.lang.reflect.Method.invokeNative(Native Method)
03-23 16:11:47.558: E/AndroidRuntime(361):  at java.lang.reflect.Method.invoke(Method.java:521)
03-23 16:11:47.558: E/AndroidRuntime(361):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
03-23 16:11:47.558: E/AndroidRuntime(361):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
03-23 16:11:47.558: E/AndroidRuntime(361):  at dalvik.system.NativeStart.main(Native Method)
03-23 16:11:47.558: E/AndroidRuntime(361): Caused by: java.lang.NullPointerException
03-23 16:11:47.558: E/AndroidRuntime(361):  at com.example.lab1.MainActivity.onCreate(MainActivity.java:25)
03-23 16:11:47.558: E/AndroidRuntime(361):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
03-23 16:11:47.558: E/AndroidRuntime(361):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
03-23 16:11:47.558: E/AndroidRuntime(361):  ... 11 more
这个问题和前面那个差不多么？应该怎么解决啊···

Answer 6

 java.lang.ClassCastException: android.widget.RelativeLayout要学会看日志，发现你的问题，logcat里都已经提示得很明显了

Answer 7

一堆东西···不知道看哪里，加上英语渣渣的。
直接找你自己定义那个包名
03-25 12:13:15.945: E/AndroidRuntime(549):  at android.database.sqlite.SQLiteStatement.executeUpdateDelete(SQLiteStatement.java:84)
03-25 12:13:15.945: E/AndroidRuntime(549):  at android.database.sqlite.SQLiteDatabase.executeSql(SQLiteDatabase.java:1899)
03-25 12:13:15.945: E/AndroidRuntime(549):  at android.database.sqlite.SQLiteDatabase.execSQL(SQLiteDatabase.java:1889)
03-25 12:13:15.945: E/AndroidRuntime(549):  at com.example.lab5.MainActivity.insertData(MainActivity.java:74)
03-25 12:13:15.945: E/AndroidRuntime(549):  at com.example.lab5.MainActivity.access$0(MainActivity.java:73)
03-25 12:13:15.945: E/AndroidRuntime(549):  at com.example.lab5.MainActivity$1.onClick(MainActivity.java:42)
03-25 12:13:15.945: E/AndroidRuntime(549):  at android.view.View.performClick(View.java:3511)
03-25 12:13:15.945: E/AndroidRuntime(549):  at android.view.View$PerformClick.run(View.java:14105)
03-25 12:13:15.945: E/AndroidRuntime(549):  at android.os.Handler.handleCallback(Handler.java:605)
03-25 12:13:15.945: E/AndroidRuntime(549):  at android.os.Handler.dispatchMessage(Handler.java:92)
03-25 12:13:15.945: E/AndroidRuntime(549):  at android.os.Looper.loop(Looper.java:137)
03-25 12:13:15.945: E/AndroidRuntime(549):  at android.app.ActivityThread.main(ActivityThread.java:4424)
03-25 12:13:15.945: E/AndroidRuntime(549):  at java.lang.reflect.Method.invokeNative(Native Method)
03-25 12:13:15.945: E/AndroidRuntime(549):  at java.lang.reflect.Method.invoke(Method.java:511)
03-25 12:13:15.945: E/AndroidRuntime(549):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
03-25 12:13:15.945: E/AndroidRuntime(549):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
03-25 12:13:15.945: E/AndroidRuntime(549):  at dalvik.system.NativeStart.main(Native Method)可以帮我看下哪里错了么··

Answer 8

这不很清楚吗
03-25 12:13:15.945: E/AndroidRuntime(549):  at com.example.lab5.MainActivity.insertData(MainActivity.java:74)
03-25 12:13:15.945: E/AndroidRuntime(549):  at com.example.lab5.MainActivity.access$0(MainActivity.java:73)
03-25 12:13:15.945: E/AndroidRuntime(549):  at com.example.lab5.MainActivity$1.onClick(MainActivity.java:42)

Answer 9

这不很清楚吗
03-25 12:13:15.945: E/AndroidRuntime(549):  at com.example.lab5.MainActivity.insertData(MainActivity.java:74)
03-25 12:13:15.945: E/AndroidRuntime(549):  at com.example.lab5.MainActivity.access$0(MainActivity.java:73)
03-25 12:13:15.945: E/AndroidRuntime(549):  at com.example.lab5.MainActivity$1.onClick(MainActivity.java:42)
哪里这么多错误怎么可以快速错误在哪里？还是都是错误的、？