Question

错误是：

07/18 11:08:26：启动应用程序$ adb install-multiple -r -t   E：\ Nav_drawer \ app \ build \ intermediates \ split-apk \ debug \ slices \ slice_2.apk   E：\ Nav_drawer \ app \ build \ intermediates \ instant-run-apk \ debug \ app-debug.apk   E：\ Nav_drawer \ app \ build \ intermediates \ split-apk \ debug \ slices \ slice_1.apk   E：\ Nav_drawer \ app \ build \ intermediates \ split-apk \ debug \ slices \ slice_8.apk   E：\ Nav_drawer \ app \ build \ intermediates \ split-apk \ debug \ slices \ slice_5.apk   E：\ Nav_drawer \ app \ build \ intermediates \ split-apk \ debug \ slices \ slice_6.apk   E：\ Nav_drawer \ app \ build \ intermediates \ split-apk \ debug \ slices \ slice_7.apk   E：\ Nav_drawer \ app \ build \ intermediates \ split-apk \ debug \ slices \ slice_4.apk   E：\ Nav_drawer \ app \ build \ intermediates \ split-apk \ debug \ slices \ slice_9.apk   E：\ Nav_drawer \ app \ build \ intermediates \ split-apk \ debug \ slices \ slice_3.apk   E：\ Nav_drawer \ app \ build \ intermediates \ split-apk \ debug \ dep \ dependencies.apk   E：\ Nav_drawer \ app \ build \ intermediates \ split-apk \ debug \ slices \ slice_0.apk   安装已拆分的APK $ $ adb shell am start -n   “ com.example.nidhi.nav_drawer / com.example.nidhi.nav_drawer.MainActivity”   -a android.intent.action.MAIN -c android.intent.category.LAUNCHER客户端尚未准备好..等待进程上线等待   进程上线已连接到设备上的进程3012   emulator-5554从以下位置捕获并显示logcat消息   应用。可以在“ Logcat输出”中禁用此行为   “调试器”设置页面中的部分。 D / AndroidRuntime：关闭   虚拟机

              --------- beginning of crash
E/AndroidRuntime: FATAL EXCEPTION: main
                  Process: com.example.nidhi.nav_drawer, PID: 3012
                  java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.nidhi.nav_drawer/com.example.nidhi.nav_drawer.MainActivity}: java.lang.ClassCastException: android.widget.FrameLayout cannot be cast to android.support.v7.widget.Toolbar
                      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.ClassCastException: android.widget.FrameLayout cannot be cast to android.support.v7.widget.Toolbar
                      at com.example.nidhi.nav_drawer.MainActivity.onCreate(MainActivity.java:32)
                      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) 
Application terminated.

Answer 1

您的代码说FramLayout无法转换为工具栏

所以这意味着您需要像这样将Framelayout投射到工具栏

Login

尝试这样更改

frame = (Toolbar) findViewById(R.id.Frameloayout);

Answer 2

为什么要尝试将FrameLayout投射到工具栏上？ FrameLayout永远不会投射到工具栏，请进行更改。

运行导航抽屉活动时出现此错误

2 个答案: