【发布时间】：2022-01-13 14:16:46
【问题描述】：
我是使用 android studio 的新手，我正在尝试使用 volley 在 Android Studio 中进行 API 调用。我已经设置了一个按钮来进行 API 调用，但是当点击应用程序崩溃时。我使用的 API 还使用了一个密钥，在其文档中说：“对 API 的所有请求都必须包含 X-AUTH-TOKEN HTTP 标头。此标头必须包含您的身份验证令牌。”我真的不明白为什么单击按钮时应用程序会崩溃。
private RequestQueue queue;
private JSONArray getText;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
queue = Volley.newRequestQueue(this);
}
private StringRequest searchNameStringRequest(String nameSearch) {
final String API = "&X-AUTH-TOKEN=<<rfrzsucnc7eo3m5hcmq6ljdzda1lz793>>";
final String NAME_SEARCH = "&getText=";
final String URL_PREFIX = "https://v1.motorapi.dk";
String url = URL_PREFIX + API + NAME_SEARCH + nameSearch;
final StringRequest stringRequest;
stringRequest = new StringRequest(Request.Method.GET, url,
response -> {
try {
JSONObject result = new JSONObject(response).getJSONObject("list");
int maxItems = result.getInt("end");
JSONArray resultList = result.getJSONArray("item");
} catch (JSONException e) {
Toast.makeText(MainActivity.this, e.getMessage(), Toast.LENGTH_LONG).show();
}
},
error -> {
Toast.makeText(MainActivity.this, "Motorregister dosen’t answer.”, Toast.LENGTH_LONG).show();
});
return stringRequest;
}
public void button(View view) {
queue.cancelAll(this);
StringRequest stringRequest = searchNameStringRequest(getText.toString());
stringRequest.setTag(this);
queue.add(stringRequest);
}
编辑这里是崩溃日志：
12/08 18:08:32: Launching 'app' on Pixel C API 29.
Install successfully finished in 1 s 791 ms.
$ adb shell am start -n "com.example.myapplication/com.example.myapplication.MainActivity" -a android.intent.action.MAIN -c android.intent.category.LAUNCHER
Connected to process 5893 on device 'Pixel_C_API_29 [emulator-5554]'.
Capturing and displaying logcat messages from application. This behavior can be disabled in the "Logcat output" section of the "Debugger" settings page.
D/libEGL: Emulator has host GPU support, qemu.gles is set to 1.
W/libc: Unable to set property "qemu.gles" to "1": connection failed; errno=13 (Permission denied)
D/libEGL: loaded /vendor/lib/egl/libEGL_emulation.so
D/libEGL: loaded /vendor/lib/egl/libGLESv1_CM_emulation.so
D/libEGL: loaded /vendor/lib/egl/libGLESv2_emulation.so
W/RenderThread: type=1400 audit(0.0:19): avc: denied { write } for name="property_service" dev="tmpfs" ino=7291 scontext=u:r:untrusted_app:s0:c147,c256,c512,c768 tcontext=u:object_r:property_socket:s0 tclass=sock_file permissive=0 app=com.example.myapplication
W/e.myapplicatio: Accessing hidden method Landroid/view/View;->computeFitSystemWindows(Landroid/graphics/Rect;Landroid/graphics/Rect;)Z (greylist, reflection, allowed)
W/e.myapplicatio: Accessing hidden method Landroid/view/ViewGroup;->makeOptionalFitsSystemWindows()V (greylist, reflection, allowed)
D/HostConnection: HostConnection::get() New Host Connection established 0xd5a9e040, tid 5931
D/HostConnection: HostComposition ext ANDROID_EMU_CHECKSUM_HELPER_v1 ANDROID_EMU_native_sync_v2 ANDROID_EMU_native_sync_v3 ANDROID_EMU_native_sync_v4 ANDROID_EMU_dma_v1 ANDROID_EMU_direct_mem ANDROID_EMU_host_composition_v1 ANDROID_EMU_host_composition_v2 ANDROID_EMU_YUV_Cache ANDROID_EMU_sync_buffer_data GL_OES_EGL_image_external_essl3 GL_OES_vertex_array_object GL_KHR_texture_compression_astc_ldr ANDROID_EMU_host_side_tracing ANDROID_EMU_gles_max_version_3_0
W/OpenGLRenderer: Failed to choose config with EGL_SWAP_BEHAVIOR_PRESERVED, retrying without...
D/EGL_emulation: eglCreateContext: 0xe1113980: maj 3 min 0 rcv 3
D/EGL_emulation: eglMakeCurrent: 0xe1113980: ver 3 0 (tinfo 0xd5ace1d0)
W/Gralloc3: mapper 3.x is not supported
D/HostConnection: createUnique: call
D/HostConnection: HostConnection::get() New Host Connection established 0xd5a9f850, tid 5931
D/HostConnection: HostComposition ext ANDROID_EMU_CHECKSUM_HELPER_v1 ANDROID_EMU_native_sync_v2 ANDROID_EMU_native_sync_v3 ANDROID_EMU_native_sync_v4 ANDROID_EMU_dma_v1 ANDROID_EMU_direct_mem ANDROID_EMU_host_composition_v1 ANDROID_EMU_host_composition_v2 ANDROID_EMU_YUV_Cache ANDROID_EMU_sync_buffer_data GL_OES_EGL_image_external_essl3 GL_OES_vertex_array_object GL_KHR_texture_compression_astc_ldr ANDROID_EMU_host_side_tracing ANDROID_EMU_gles_max_version_3_0
D/eglCodecCommon: allocate: Ask for block of size 0x1000
D/eglCodecCommon: allocate: ioctl allocate returned offset 0x3ffff6000 size 0x2000
D/EGL_emulation: eglMakeCurrent: 0xe1113980: ver 3 0 (tinfo 0xd5ace1d0)
I/AssistStructure: Flattened final assist data: 1576 bytes, containing 1 windows, 9 views
D/AndroidRuntime: Shutting down VM
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.myapplication, PID: 5893
java.lang.IllegalStateException: Could not execute method for android:onClick
at androidx.appcompat.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:446)
at android.view.View.performClick(View.java:7125)
at com.google.android.material.button.MaterialButton.performClick(MaterialButton.java:1119)
at android.view.View.performClickInternal(View.java:7102)
at android.view.View.access$3500(View.java:801)
at android.view.View$PerformClick.run(View.java:27336)
at android.os.Handler.handleCallback(Handler.java:883)
at android.os.Handler.dispatchMessage(Handler.java:100)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7356)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at androidx.appcompat.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:441)
at android.view.View.performClick(View.java:7125)
at com.google.android.material.button.MaterialButton.performClick(MaterialButton.java:1119)
at android.view.View.performClickInternal(View.java:7102)
at android.view.View.access$3500(View.java:801)
at android.view.View$PerformClick.run(View.java:27336)
at android.os.Handler.handleCallback(Handler.java:883)
at android.os.Handler.dispatchMessage(Handler.java:100)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7356)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String org.json.JSONArray.toString()' on a null object reference
at com.example.myapplication.MainActivity.button(MainActivity.java:84)
at java.lang.reflect.Method.invoke(Native Method)
at androidx.appcompat.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:441)
at android.view.View.performClick(View.java:7125)
at com.google.android.material.button.MaterialButton.performClick(MaterialButton.java:1119)
at android.view.View.performClickInternal(View.java:7102)
at android.view.View.access$3500(View.java:801)
at android.view.View$PerformClick.run(View.java:27336)
at android.os.Handler.handleCallback(Handler.java:883)
at android.os.Handler.dispatchMessage(Handler.java:100)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7356)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
I/Process: Sending signal. PID: 5893 SIG: 9
【问题讨论】：
-
请与我们分享您的崩溃日志。
-
强烈推荐使用改造网络通信。
-
我们需要崩溃日志。但是，除非 Volley 具有您绝对需要的功能，否则我会避免使用它。它有很多你需要编写的样板，并且它有一些糟糕的实现问题。特别是不要通过它下载大文件-它将所有数据保存在内存中的字符串中，因此下载几百兆的文件可能会使您崩溃
-
在哪里可以找到崩溃日志？
标签： android android-studio android-volley