android - 从 firebase android 获取数据时项目终止

Question

我将数据插入到 firebase，现在想从 firebase 获取该数据，但项目在某个时候终止了。我调试代码并得到这些..

我正在尝试从 firebase 数据库中获取这些数据。

rcsfirebaseproject

     -test2
        -L03KXCTlprnkQ3-Fsfl
            pubid: 
                 "-L03KXCTlprnkQ3-Fsfl"
            publisher: 
                  "test"
           reseracher: 
                  "test2"
           tile: 
                 "test3"

我使用代码插入此数据

FirebaseDatabase database = FirebaseDatabase.getInstance();
        DatabaseReference myRef = database.getReference("test2");
        String paperid=myRef.push().getKey();
        publishedpaperitemdemi pubpaper=new                  
           publishedpaperitemdemi(paperid,"test","test2","test3");
        myRef.child(paperid).setValue(pubpaper);

这很好用
我想使用

检索这些数据

// Read from the database
        myRef.addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(DataSnapshot dataSnapshot) {
                 for (DataSnapshot papershapshot: dataSnapshot.getChildren()){
                    publishedpaperitemdemi 
                 pubda=papershapshot.getValue(publishedpaperitemdemi.class);
                    long abc=papershapshot.getChildrenCount();

                }
          }

            @Override
            public void onCancelled(DatabaseError error) {
                // Failed to read value
            //    Log.w(TAG, "Failed to read value.", error.toException());
            }
        });

到达代码时

publishedpaperitemdemi 
                     pubda=papershapshot.getValue(publishedpaperitemdemi.class);

终止
我按照下面的屏幕截图调试了代码

为什么项目在此时终止，请帮忙

t 的 logcat 详细信息

    12-11 12:48:53.497 1588-1639/system_process E/InputDispatcher: channel '7fe09e7 com.example.ahmadkhan.rcs/com.example.ahmadkhan.rcs.testfirebasedbActivity (server)' ~ Channel is unrecoverably broken and will be disposed!
12-11 12:48:53.497 1588-1639/system_process E/InputDispatcher: channel 'f311c3d Toast (server)' ~ Channel is unrecoverably broken and will be disposed!
12-11 12:48:53.791 7214-7214/? E/memtrack: Couldn't load memtrack module (No such file or directory)
12-11 12:48:53.791 7214-7214/? E/android.os.Debug: failed to load memtrack module: -2
12-11 12:48:54.360 7227-7227/? E/memtrack: Couldn't load memtrack module (No such file or directory)
12-11 12:48:54.360 7227-7227/? E/android.os.Debug: failed to load memtrack module: -2
12-11 12:48:55.664 7242-7242/? E/memtrack: Couldn't load memtrack module (No such file or directory)
12-11 12:48:55.664 7242-7242/? E/android.os.Debug: failed to load memtrack module: -2
12-11 12:49:18.440 7254-7254/? E/memtrack: Couldn't load memtrack module (No such file or directory)
12-11 12:49:18.440 7254-7254/? E/android.os.Debug: failed to load memtrack module: -2
12-11 12:49:18.462 7254-7268/? E/art: Thread attaching while runtime is shutting down: Binder_1
12-11 12:49:18.462 7256-7256/? E/memtrack: Couldn't load memtrack module (No such file or directory)
12-11 12:49:18.464 7256-7256/? E/android.os.Debug: failed to load memtrack module: -2
12-11 12:49:18.917 7272-7272/? E/memtrack: Couldn't load memtrack module (No such file or directory)
12-11 12:49:18.917 7272-7272/? E/android.os.Debug: failed to load memtrack module: -2
12-11 12:49:19.245 7283-7283/? E/memtrack: Couldn't load memtrack module (No such file or directory)
12-11 12:49:19.245 7283-7283/? E/android.os.Debug: failed to load memtrack module: -2
12-11 12:49:19.633 7294-7294/? E/memtrack: Couldn't load memtrack module (No such file or directory)
12-11 12:49:19.633 7294-7294/? E/android.os.Debug: failed to load memtrack module: -2
12-11 12:49:20.405 1311-1311/? E/installd: Couldn't opendir /data/app/vmdl475084502.tmp: No such file or directory
12-11 12:49:20.663 1922-5855/com.google.android.gms.persistent E/NetworkScheduler: Unrecognised action provided: android.intent.action.PACKAGE_REMOVED
12-11 12:49:21.461 7330-7330/? E/memtrack: Couldn't load memtrack module (No such file or directory)
12-11 12:49:21.461 7330-7330/? E/android.os.Debug: failed to load memtrack module: -2
12-11 12:49:21.704 1941-2129/com.android.launcher3 E/Surface: getSlotFromBufferLocked: unknown buffer: 0xaab0a3c0
12-11 12:49:24.408 1588-3667/system_process E/Surface: getSlotFromBufferLocked: unknown buffer: 0x9c2f58c0
12-11 12:49:24.430 7357-7357/? E/dex2oat: Failed to create oat file: /data/dalvik-cache/x86/data@app@com.example.ahmadkhan.rcs-1@split_lib_dependencies_apk.apk@classes.dex: Permission denied
12-11 12:49:24.571 7359-7359/? E/dex2oat: Failed to create oat file: /data/dalvik-cache/x86/data@app@com.example.ahmadkhan.rcs-1@split_lib_slice_0_apk.apk@classes.dex: Permission denied
12-11 12:49:24.607 7361-7361/? E/dex2oat: Failed to create oat file: /data/dalvik-cache/x86/data@app@com.example.ahmadkhan.rcs-1@split_lib_slice_1_apk.apk@classes.dex: Permission denied
12-11 12:49:24.653 7363-7363/? E/dex2oat: Failed to create oat file: /data/dalvik-cache/x86/data@app@com.example.ahmadkhan.rcs-1@split_lib_slice_2_apk.apk@classes.dex: Permission denied
12-11 12:49:24.679 7365-7365/? E/dex2oat: Failed to create oat file: /data/dalvik-cache/x86/data@app@com.example.ahmadkhan.rcs-1@split_lib_slice_3_apk.apk@classes.dex: Permission denied
12-11 12:49:24.691 7367-7367/? E/dex2oat: Failed to create oat file: /data/dalvik-cache/x86/data@app@com.example.ahmadkhan.rcs-1@split_lib_slice_4_apk.apk@classes.dex: Permission denied
12-11 12:49:24.702 7369-7369/? E/dex2oat: Failed to create oat file: /data/dalvik-cache/x86/data@app@com.example.ahmadkhan.rcs-1@split_lib_slice_5_apk.apk@classes.dex: Permission denied
12-11 12:49:24.717 7371-7371/? E/dex2oat: Failed to create oat file: /data/dalvik-cache/x86/data@app@com.example.ahmadkhan.rcs-1@split_lib_slice_6_apk.apk@classes.dex: Permission denied
12-11 12:49:24.736 7373-7373/? E/dex2oat: Failed to create oat file: /data/dalvik-cache/x86/data@app@com.example.ahmadkhan.rcs-1@split_lib_slice_7_apk.apk@classes.dex: Permission denied
12-11 12:49:24.751 7375-7375/? E/dex2oat: Failed to create oat file: /data/dalvik-cache/x86/data@app@com.example.ahmadkhan.rcs-1@split_lib_slice_8_apk.apk@classes.dex: Permission denied
12-11 12:49:24.769 7377-7377/? E/dex2oat: Failed to create oat file: /data/dalvik-cache/x86/data@app@com.example.ahmadkhan.rcs-1@split_lib_slice_9_apk.apk@classes.dex: Permission denied
12-11 12:49:25.398 1216-1276/? E/SurfaceFlinger: ro.sf.lcd_density must be defined as a build property
12-11 12:49:28.874 7344-7384/com.example.ahmadkhan.rcs E/Surface: getSlotFromBufferLocked: unknown buffer: 0xae5828c0
12-11 12:50:11.906 7405-7405/? E/memtrack: Couldn't load memtrack module (No such file or directory)
12-11 12:50:11.906 7405-7405/? E/android.os.Debug: failed to load memtrack module: -2
12-11 12:50:12.273 7420-7420/? E/memtrack: Couldn't load memtrack module (No such file or directory)
12-11 12:50:12.273 7420-7420/? E/android.os.Debug: failed to load memtrack module: -2
12-11 12:50:21.745 7430-7430/? E/memtrack: Couldn't load memtrack module (No such file or directory)
12-11 12:50:21.745 7430-7430/? E/android.os.Debug: failed to load memtrack module: -2
12-11 12:50:21.748 7432-7432/? E/memtrack: Couldn't load memtrack module (No such file or directory)
12-11 12:50:21.748 7432-7432/? E/android.os.Debug: failed to load memtrack module: -2
12-11 12:50:21.765 7432-7446/? E/art: Thread attaching while runtime is shutting down: Binder_2
12-11 12:50:21.766 7430-7444/? E/art: Thread attaching while runtime is shutting down: Binder_1
12-11 12:50:23.806 7454-7454/? E/memtrack: Couldn't load memtrack module (No such file or directory)
12-11 12:50:23.806 7454-7454/? E/android.os.Debug: failed to load memtrack module: -2
12-11 12:50:24.189 1941-2129/com.android.launcher3 E/Surface: getSlotFromBufferLocked: unknown buffer: 0xaab0a820
12-11 12:50:26.829 1588-3667/system_process E/Surface: getSlotFromBufferLocked: unknown buffer: 0x9c2f5f00
12-11 12:50:26.849 7475-7475/? E/dex2oat: Failed to create oat file: /data/dalvik-cache/x86/data@app@com.example.ahmadkhan.rcs-1@split_lib_dependencies_apk.apk@classes.dex: Permission denied
12-11 12:50:27.146 7477-7477/? E/dex2oat: Failed to create oat file: /data/dalvik-cache/x86/data@app@com.example.ahmadkhan.rcs-1@split_lib_slice_0_apk.apk@classes.dex: Permission denied
12-11 12:50:27.172 7480-7480/? E/dex2oat: Failed to create oat file: /data/dalvik-cache/x86/data@app@com.example.ahmadkhan.rcs-1@split_lib_slice_1_apk.apk@classes.dex: Permission denied
12-11 12:50:27.189 7482-7482/? E/dex2oat: Failed to create oat file: /data/dalvik-cache/x86/data@app@com.example.ahmadkhan.rcs-1@split_lib_slice_2_apk.apk@classes.dex: Permission denied
12-11 12:50:27.209 7484-7484/? E/dex2oat: Failed to create oat file: /data/dalvik-cache/x86/data@app@com.example.ahmadkhan.rcs-1@split_lib_slice_3_apk.apk@classes.dex: Permission denied
12-11 12:50:27.229 7486-7486/? E/dex2oat: Failed to create oat file: /data/dalvik-cache/x86/data@app@com.example.ahmadkhan.rcs-1@split_lib_slice_4_apk.apk@classes.dex: Permission denied
12-11 12:50:27.248 7488-7488/? E/dex2oat: Failed to create oat file: /data/dalvik-cache/x86/data@app@com.example.ahmadkhan.rcs-1@split_lib_slice_5_apk.apk@classes.dex: Permission denied
12-11 12:50:27.261 7490-7490/? E/dex2oat: Failed to create oat file: /data/dalvik-cache/x86/data@app@com.example.ahmadkhan.rcs-1@split_lib_slice_6_apk.apk@classes.dex: Permission denied
12-11 12:50:27.280 7492-7492/? E/dex2oat: Failed to create oat file: /data/dalvik-cache/x86/data@app@com.example.ahmadkhan.rcs-1@split_lib_slice_7_apk.apk@classes.dex: Permission denied
12-11 12:50:27.301 7494-7494/? E/dex2oat: Failed to create oat file: /data/dalvik-cache/x86/data@app@com.example.ahmadkhan.rcs-1@split_lib_slice_8_apk.apk@classes.dex: Permission denied
12-11 12:50:27.319 7496-7496/? E/dex2oat: Failed to create oat file: /data/dalvik-cache/x86/data@app@com.example.ahmadkhan.rcs-1@split_lib_slice_9_apk.apk@classes.dex: Permission denied
12-11 12:50:28.180 1216-1271/? E/SurfaceFlinger: ro.sf.lcd_density must be defined as a build property
12-11 12:50:31.628 7462-7503/com.example.ahmadkhan.rcs E/Surface: getSlotFromBufferLocked: unknown buffer: 0xaab0a960
12-11 12:50:48.150 1588-1639/system_process E/InputDispatcher: channel 'd063fc9 com.example.ahmadkhan.rcs/com.example.ahmadkhan.rcs.testfirebasedbActivity (server)' ~ Channel is unrecoverably broken and will be disposed!

Answer 1

我看到该错误的最常见原因之一，Channel is unrecoverably broken and will be disposed! 是当您尝试在不在的 Activity 中显示警报对话框或进度对话框时前景。

关于您的屏幕截图，该数据是 papershapshot 对象包含的内容。我看不出那里有什么问题。