我(认为)我已经配置了我的代码,这样当单击图像时,它会打开一个包含一些信息的对话框。但是,当我单击图像时,它没有打开对话框,而是显示设备屏幕上的 MY_APP 已停止
。
我正在使用 Android studio 来实现此目的,当我构建
我的项目时,我没有遇到任何编译器错误。但是,它在该设备上不起作用。
这是我的代码:
UserDataInputActivity.java
package com.example.owner.introductoryapplication;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;
import android.view.View;
public class UserDataInputActivity extends AppCompatActivity
{
String[] genderOptions = {"Male", "Female", "Other"};
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_user_data_input);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,android.R.layout.select_dialog_singlechoice, genderOptions);
//Find TextView control
AutoCompleteTextView acTextView = (AutoCompleteTextView) findViewById(R.id.GenderPromptValue);
//Set the number of characters the user must type before the drop down list is shown
acTextView.setThreshold(1);
//Set the adapter
acTextView.setAdapter(adapter);
}
public void onGenericMenuClick(View v)
{
Intent intent;
if(v.getId() == R.id.pasttests)
{
intent = new Intent(this, PastDiagnosticResult.class);
}
else if (v.getId() == R.id.currenttest)
{
intent = new Intent(this, CurrentDiagnosticResultActivity.class);
}
else if (v.getId() == R.id.myinfo)
{
intent = new Intent(this, UserDataInputActivity.class);
}
else //if(v.getId() == R.id.gaitInfoButton)
{
intent = new Intent(this, GaitInformation.class);
}
startActivity(intent);
overridePendingTransition(android.R.anim.fade_in, android.R.anim.fade_out);
}
}
GaitInformation.java
package com.example.owner.introductoryapplication;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.support.v4.app.DialogFragment;
public class GaitInformation extends DialogFragment {
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
// Use the Builder class for convenient dialog construction
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setMessage(R.string.GaitInformationContent)
.setPositiveButton(R.string.acknowledge, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
//GO BACK TO THE USER DATA INPUT PAGE - HOW?
}
});
// Create the AlertDialog object and return it
return builder.create();
}
}
LOGCAT CRUSH 报告
2019-01-04 14:24:34.741 8385-8385/com.example.owner.introductoryapplication E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.owner.introductoryapplication, PID: 8385
java.lang.IllegalStateException: Could not execute method for android:onClick
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:390)
at android.view.View.performClick(View.java:6312)
at android.view.View$PerformClick.run(View.java:24802)
at android.os.Handler.handleCallback(Handler.java:790)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:169)
at android.app.ActivityThread.main(ActivityThread.java:6521)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:385)
at android.view.View.performClick(View.java:6312)
at android.view.View$PerformClick.run(View.java:24802)
at android.os.Handler.handleCallback(Handler.java:790)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:169)
at android.app.ActivityThread.main(ActivityThread.java:6521)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
Caused by: android.content.ActivityNotFoundException: Unable to find explicit activity class {com.example.owner.introductoryapplication/com.example.owner.introductoryapplication.GaitInformation}; have you declared this activity in your AndroidManifest.xml?
at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1940)
at android.app.Instrumentation.execStartActivity(Instrumentation.java:1618)
at android.app.Activity.startActivityForResult(Activity.java:4529)
at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:767)
at android.app.Activity.startActivityForResult(Activity.java:4487)
at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:754)
at android.app.Activity.startActivity(Activity.java:4848)
at android.app.Activity.startActivity(Activity.java:4816)
at com.example.owner.introductoryapplication.UserDataInputActivity.onGenericMenuClick(UserDataInputActivity.java:52)
at java.lang.reflect.Method.invoke(Native Method)
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:385)
at android.view.View.performClick(View.java:6312)
at android.view.View$PerformClick.run(View.java:24802)
at android.os.Handler.handleCallback(Handler.java:790)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:169)
at android.app.ActivityThread.main(ActivityThread.java:6521)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
2019-01-04 14:24:35.040 2367-2389/? E/libnav: CablComputeBacklightLevel(): UpdateType = DifferentSceneUpdate
2019-01-04 14:24:35.251 2638-2670/? E/ActivityTrigger: activityResumeTrigger: not whiteListedcom.example.owner.introductoryapplication/com.example.owner.introductoryapplication.PastDiagnosticResult/1
2019-01-04 14:24:40.474 2367-2389/? E/libnav: CablComputeBacklightLevel(): UpdateType = DifferentSceneUpdate
我希望弹出该对话框,但相反,它说我的应用程序已停止工作。
最佳答案
您无法像这样打开 DialogFragment。请尝试这个。
package com.example.owner.introductoryapplication;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;
import android.view.View;
public class UserDataInputActivity extends AppCompatActivity
{
String[] genderOptions = {"Male", "Female", "Other"};
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_user_data_input);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,android.R.layout.select_dialog_singlechoice, genderOptions);
//Find TextView control
AutoCompleteTextView acTextView = (AutoCompleteTextView) findViewById(R.id.GenderPromptValue);
//Set the number of characters the user must type before the drop down list is shown
acTextView.setThreshold(1);
//Set the adapter
acTextView.setAdapter(adapter);
}
public void onGenericMenuClick(View v)
{
Intent intent = null;
if(v.getId() == R.id.pasttests)
{
intent = new Intent(this, PastDiagnosticResult.class);
}
else if (v.getId() == R.id.currenttest)
{
intent = new Intent(this, CurrentDiagnosticResultActivity.class);
}
else if (v.getId() == R.id.myinfo)
{
intent = new Intent(this, UserDataInputActivity.class);
}
else //if(v.getId() == R.id.gaitInfoButton)
{
AlertDialog.Builder builder = new AlertDialog.Builder(UserDataInputActivity.this);
builder.setMessage(R.string.GaitInformationContent)
.setPositiveButton(R.string.acknowledge, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
//GO BACK TO THE USER DATA INPUT PAGE - HOW?
}
});
// Create the AlertDialog object and return it
builder.create().show();
}
if (intent != null) {
startActivity(intent);
overridePendingTransition(android.R.anim.fade_in, android.R.anim.fade_out);
}
}
}
关于java - 单击图像时不出现对话框 fragment ,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/54045814/