我有一个问题，无法调试它。当我尝试登录或注册时，应用程序崩溃。当只添加一封信时，我会收到消息"我的应用程序"不断停止。
我在登录/注册活动中没有任何问题，我无法调试它，因为应用程序在第一个字母上就崩溃了。
谢谢你的帮助。
这是登录活动，例如：
import android.content.Intent;
import android.support.design.widget.TextInputLayout;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;
/**
* Login
* This class for login
* Check if the input is admin and send to another activity
*/
public class Login extends AppCompatActivity {
DatabaseHelper helper = new DatabaseHelper(this);
private TextInputLayout textInputPassword;
private TextInputLayout textInputUsername;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login_join);
textInputUsername = findViewById(R.id.etUserName);
textInputPassword = findViewById(R.id.etPassword);
TextView tvjuinUs = (TextView) findViewById(R.id.tvJuinUs);
//Check if user already exist pass move to login
tvjuinUs.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent = new Intent(Login.this, JoinUs.class);
startActivity(intent);
finish();
}
});
}
//Check if user name & password exist in database
public void CheckDetails(View v) {
String username = textInputUsername.getEditText().getText().toString().trim();
String pass = textInputPassword.getEditText().getText().toString().trim();
try {
if ((username.equals("admin")) && (pass.equals("admin"))) {
Intent intent = new Intent(Login.this, AdminConnection.class);
startActivity(intent);
}
} catch (Exception e) {
e.printStackTrace();
}
//Check match beetwen user name and pass
if (!(helper.checkMatcForUser(username, pass))) {
Toast.makeText(getApplicationContext(), "Login Failed. The email or password you entered is incorrect", Toast.LENGTH_LONG).show();
textInputUsername.setError("ERROR !!!");
textInputPassword.setError("ERROR !!!");
return;
}
if ((helper.searchUsername(username)) && (helper.searchPassword(pass))) {
} else {
textInputUsername.setError("User or Password don't match!");
textInputPassword.setError("Password or user don't match!");
}
}
}
这是错误：
E/InputEventSender: Exception dispatching finished signal.
E/MessageQueue-JNI: Exception in MessageQueue callback:
handleReceiveCallback
E/MessageQueue-JNI: java.lang.NoSuchMethodError: No static method
dispatchUnhandledKeyEventPre(Landroid/view/View;Landroid/view/KeyEvent;)Z in class Landroid/support/v4/view/ViewCompat; or its super classes (declaration of 'android.support.v4.view.ViewCompat' appears in /data/app/com.example.aviorka.bstrong-ZZzNIVOJeVtP54s_AGokUw==/base.apk)
at android.support.v7.app.AppCompatDelegateImpl.dispatchKeyEvent(AppCompatDelegateImpl.java:1162)
at android.support.v7.app.AppCompatDelegateImpl$AppCompatWindowCallback.dispatchKeyEvent(AppCompatDelegateImpl.java:2529)
at com.android.internal.policy.DecorView.dispatchKeyEvent(DecorView.java:342)
at android.view.ViewRootImpl$ViewPostImeInputStage.processKeyEvent(ViewRootImpl.java:4991)
at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:4856)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4377)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4430)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4396)
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:4536)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4404)
at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:4593)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4377)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4430)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4396)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4404)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4377)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4430)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4396)
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:4569)
at android.view.ViewRootImpl$ImeInputStage.onFinishedInputEvent(ViewRootImpl.java:4730)
at android.view.inputmethod.InputMethodManager$PendingEvent.run(InputMethodManager.java:2559)
at android.view.inputmethod.InputMethodManager.invokeFinishedInputEventCallback(InputMethodManager.java:2069)
at android.view.inputmethod.InputMethodManager.finishedInputEvent(InputMethodManager.java:2060)
at android.view.inputmethod.InputMethodManager$ImeInputEventSender.onInputEventFinished(InputMethodManager.java:2536)
at android.view.InputEventSender.dispatchInputEventFinished(InputEventSender.java:141)
at android.os.MessageQueue.nativePollOnce(Native Method)
at android.os.MessageQueue.next(MessageQueue.java:326)
at android.os.Looper.loop(Looper.java:160)
at android.app.ActivityThread.main(ActivityThread.java:6642)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
D/AndroidRuntime: Shutting down VM
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.aviorka.bstrong, PID: 8924
java.lang.NoSuchMethodError: No static method
dispatchUnhandledKeyEventPre(Landroid/view/View;Landroid/view/KeyEvent;)Z in class Landroid/support/v4/view/ViewCompat; or its super classes (declaration of 'android.support.v4.view.ViewCompat' appears in /data/app/com.example.aviorka.bstrong-ZZzNIVOJeVtP54s_AGokUw==/base.apk)
at android.support.v7.app.AppCompatDelegateImpl.dispatchKeyEvent(AppCompatDelegateImpl.java:1162)
at android.support.v7.app.AppCompatDelegateImpl$AppCompatWindowCallback.dispatchKeyEvent(AppCompatDelegateImpl.java:2529)
at com.android.internal.policy.DecorView.dispatchKeyEvent(DecorView.java:342)
at android.view.ViewRootImpl$ViewPostImeInputStage.processKeyEvent(ViewRootImpl.java:4991)
at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:4856)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4377)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4430)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4396)
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:4536)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4404)
at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:4593)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4377)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4430)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4396)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4404)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4377)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4430)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4396)
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:4569)
at android.view.ViewRootImpl$ImeInputStage.onFinishedInputEvent(ViewRootImpl.java:4730)
at android.view.inputmethod.InputMethodManager$PendingEvent.run(InputMethodManager.java:2559)
at android.view.inputmethod.InputMethodManager.invokeFinishedInputEventCallback(InputMethodManager.java:2069)
at android.view.inputmethod.InputMethodManager.finishedInputEvent(InputMethodManager.java:2060)
at android.view.inputmethod.InputMethodManager$ImeInputEventSender.onInputEventFinished(InputMethodManager.java:2536)
at android.view.InputEventSender.dispatchInputEventFinished(InputEventSender.java:141)
at android.os.MessageQueue.nativePollOnce(Native Method)
at android.os.MessageQueue.next(MessageQueue.java:326)
at android.os.Looper.loop(Looper.java:160)
at android.app.ActivityThread.main(ActivityThread.java:6642)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
I/Process: Sending signal. PID: 8924 SIG: 9
Disconnected from the target VM, address: 'localhost:8600', transport:
'socket'
//此支持库：build.gradle(模块：应用程序(
apply plugin: 'com.android.application'
android {
compileSdkVersion 28
defaultConfig {
applicationId "com.example.aviorka.bstrong"
minSdkVersion 28
targetSdkVersion 28
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
productFlavors {
}
}
dependencies {
implementation fileTree(include: ['*.jar'], dir: 'libs')
//noinspection GradleCompatible
implementation 'com.android.support:appcompat-v7:28.0.0-alpha3'
implementation 'com.android.support:cardview-v7:28.0.0-alpha3'
implementation 'com.android.support:design:28.0.0-alpha3'
implementation 'com.thoughtbot:expandablerecyclerview:1.3'
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
implementation 'com.android.support:support-v4:28.0.0'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.2'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
}
更新支持库，它将被修复。
我从应用程序gradle更新到28.0.0，而不是28.0.0-alpha3。并设置minSDK版本21。
问题解决了！
28.0.0的稳定版本现在可用。请使用
28.0.0
版本而不是
28.0.0-alpha3
并且现在也设置minSdkVersion 21 (Android L)。因为你设置了minSdkVersion 28 (Android P)，这意味着它只能在Android 9设备中工作。