該按鈕在android應用程序中不起作用
[英]The button doesn't work in the android application
問題描述
我正在從“ TheNewBoston”視頻中學習android，並且卡在其中一個視頻中，我有一些按鈕，使用此代碼時，單擊此按鈕時應打開某些操作，但它不起作用，按鈕不起作用有任何響應，也沒有任何崩潰，我找不到任何問題可以解決，這是Data.java中的start和startFor按鈕：
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.ehsan.myproject"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="19" />
<uses-permission android:name="android.permission.SET_WALLPAPER" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".Splash"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".Menu"
android:label="@string/app_name" >
<intent-filter>
<action android:name="com.ehsan.myproject.MENU" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity
android:name=".Prefs"
android:label="@string/app_name" >
<intent-filter>
<action android:name="com.ehsan.myproject.PREFS" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity
android:name=".AboutUs"
android:label="@string/app_name"
android:theme="@android:style/Theme.Dialog" >
<intent-filter>
<action android:name="com.ehsan.myproject.ABOUTUS" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="com.ehsan.myproject.MAINACTIVITY" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity
android:name=".TextPlay"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Email"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Camera"
android:label="@string/app_name"
android:theme="@drawable/url" >
</activity>
<activity
android:name=".Data"
android:label="@string/app_name"
android:theme="@drawable/url" >
<intent-filter>
<action android:name="com.ehsan.myproject.DATA" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity
android:name=".OpenedClass"
android:label="@string/app_name"
android:theme="@drawable/url" >
<intent-filter>
<action android:name="com.ehsan.myproject.OPENEDCLASS" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
</application>
</manifest>
資料庫
package com.ehsan.myproject;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class Data extends Activity implements View.OnClickListener {
Button start, startFor;
EditText sendET;
TextView gotAnswer;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.get);
initialize();
}
private void initialize() {
// TODO Auto-generated method stub
start = (Button) findViewById(R.id.bSA);
startFor = (Button) findViewById(R.id.bSAFR);
sendET = (EditText) findViewById(R.id.etSend);
gotAnswer = (TextView) findViewById(R.id.tvGot);
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.bSA:
String bread = sendET.getText().toString();
Bundle basket = new Bundle();
basket.putString("i am hungry", bread);
Intent k = new Intent(Data.this, OpenedClass.class);
k.putExtras(basket);
startActivity(k);
break;
case R.id.bSAFR:
Intent i = new Intent(Data.this, OpenedClass.class);
startActivityForResult(i, 0);
break;
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);
Bundle basket = data.getExtras();
String s = basket.getString("answer");
gotAnswer.setText(s);
}
}
OpenedClass.java
package com.ehsan.myproject;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.RadioGroup;
import android.widget.TextView;
import android.widget.RadioGroup;
public class OpenedClass extends Activity implements OnClickListener,
OnCheckedChangeListener {
TextView question, text;
RadioGroup selectionList;
Button returnData;
String gotBread, sendData;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.send);
initialize();
Bundle getBasket = getIntent().getExtras();
if (getBasket != null) {
gotBread = getBasket.getString("i am hungry");
question.setText(gotBread);
}
}
private void initialize() {
// TODO Auto-generated method stub
question = (TextView) findViewById(R.id.tvQuestion);
text = (TextView) findViewById(R.id.tvText);
returnData = (Button) findViewById(R.id.bReturn);
selectionList = (RadioGroup) findViewById(R.id.rgAnswers);
returnData.setOnClickListener(this);
selectionList.setOnCheckedChangeListener((android.widget.RadioGroup.OnCheckedChangeListener) this);
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent person = new Intent();
Bundle backPack = new Bundle();
backPack.putString("answer", sendData);
person.putExtras(backPack);
setResult(RESULT_OK, person);
finish();
}
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
// TODO Auto-generated method stub
switch (selectionList.getCheckedRadioButtonId()) {
case R.id.rCrazy:
sendData = "probably right!";
break;
case R.id.rSexy:
sendData = "definitely right!";
break;
case R.id.rBoth:
sendData = "spot on!";
break;
}
text.setText(sendData);
}
}
現在我添加了start.setOnClickListener（this）; 和startFor.setOnClickListener（this）; 到ititialize（），但是當我單擊start或startFor按鈕時，應用程序崩潰。 幫我找到解決辦法，
logcat錯誤
08-09 08:05:28.927: E/AndroidRuntime(1793): FATAL EXCEPTION: main
08-09 08:05:28.927: E/AndroidRuntime(1793): Process: com.ehsan.myproject, PID: 1793
08-09 08:05:28.927: E/AndroidRuntime(1793): java.lang.RuntimeException: Unable to instantiate application android.app.Application: java.lang.IllegalStateException: Unable to get package info for com.ehsan.myproject; is package not installed?
08-09 08:05:28.927: E/AndroidRuntime(1793): at android.app.LoadedApk.makeApplication(LoadedApk.java:516)
08-09 08:05:28.927: E/AndroidRuntime(1793): at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4317)
08-09 08:05:28.927: E/AndroidRuntime(1793): at android.app.ActivityThread.access$1500(ActivityThread.java:135)
08-09 08:05:28.927: E/AndroidRuntime(1793): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
08-09 08:05:28.927: E/AndroidRuntime(1793): at android.os.Handler.dispatchMessage(Handler.java:102)
08-09 08:05:28.927: E/AndroidRuntime(1793): at android.os.Looper.loop(Looper.java:136)
08-09 08:05:28.927: E/AndroidRuntime(1793): at android.app.ActivityThread.main(ActivityThread.java:5017)
08-09 08:05:28.927: E/AndroidRuntime(1793): at java.lang.reflect.Method.invokeNative(Native Method)
08-09 08:05:28.927: E/AndroidRuntime(1793): at java.lang.reflect.Method.invoke(Method.java:515)
08-09 08:05:28.927: E/AndroidRuntime(1793): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
08-09 08:05:28.927: E/AndroidRuntime(1793): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
08-09 08:05:28.927: E/AndroidRuntime(1793): at dalvik.system.NativeStart.main(Native Method)
08-09 08:05:28.927: E/AndroidRuntime(1793): Caused by: java.lang.IllegalStateException: Unable to get package info for com.ehsan.myproject; is package not installed?
08-09 08:05:28.927: E/AndroidRuntime(1793): at android.app.LoadedApk.initializeJavaContextClassLoader(LoadedApk.java:376)
08-09 08:05:28.927: E/AndroidRuntime(1793): at android.app.LoadedApk.getClassLoader(LoadedApk.java:329)
08-09 08:05:28.927: E/AndroidRuntime(1793): at android.app.LoadedApk.makeApplication(LoadedApk.java:508)
08-09 08:05:28.927: E/AndroidRuntime(1793): ... 11 more
08-09 08:08:01.527: E/AndroidRuntime(1827): FATAL EXCEPTION: main
08-09 08:08:01.527: E/AndroidRuntime(1827): Process: com.ehsan.myproject, PID: 1827
08-09 08:08:01.527: E/AndroidRuntime(1827): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.ehsan.myproject/com.ehsan.myproject.OpenedClass}: java.lang.ClassCastException: com.ehsan.myproject.OpenedClass cannot be cast to android.widget.RadioGroup$OnCheckedChangeListener
08-09 08:08:01.527: E/AndroidRuntime(1827): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2195)
08-09 08:08:01.527: E/AndroidRuntime(1827): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
08-09 08:08:01.527: E/AndroidRuntime(1827): at android.app.ActivityThread.access$800(ActivityThread.java:135)
08-09 08:08:01.527: E/AndroidRuntime(1827): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
08-09 08:08:01.527: E/AndroidRuntime(1827): at android.os.Handler.dispatchMessage(Handler.java:102)
08-09 08:08:01.527: E/AndroidRuntime(1827): at android.os.Looper.loop(Looper.java:136)
08-09 08:08:01.527: E/AndroidRuntime(1827): at android.app.ActivityThread.main(ActivityThread.java:5017)
08-09 08:08:01.527: E/AndroidRuntime(1827): at java.lang.reflect.Method.invokeNative(Native Method)
08-09 08:08:01.527: E/AndroidRuntime(1827): at java.lang.reflect.Method.invoke(Method.java:515)
08-09 08:08:01.527: E/AndroidRuntime(1827): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
08-09 08:08:01.527: E/AndroidRuntime(1827): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
08-09 08:08:01.527: E/AndroidRuntime(1827): at dalvik.system.NativeStart.main(Native Method)
08-09 08:08:01.527: E/AndroidRuntime(1827): Caused by: java.lang.ClassCastException: com.ehsan.myproject.OpenedClass cannot be cast to android.widget.RadioGroup$OnCheckedChangeListener
08-09 08:08:01.527: E/AndroidRuntime(1827): at com.ehsan.myproject.OpenedClass.initialize(OpenedClass.java:43)
08-09 08:08:01.527: E/AndroidRuntime(1827): at com.ehsan.myproject.OpenedClass.onCreate(OpenedClass.java:28)
08-09 08:08:01.527: E/AndroidRuntime(1827): at android.app.Activity.performCreate(Activity.java:5231)
08-09 08:08:01.527: E/AndroidRuntime(1827): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
08-09 08:08:01.527: E/AndroidRuntime(1827): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159)
08-09 08:08:01.527: E/AndroidRuntime(1827): ... 11 more
08-09 08:11:13.597: E/AndroidRuntime(1922): FATAL EXCEPTION: main
08-09 08:11:13.597: E/AndroidRuntime(1922): Process: com.ehsan.myproject, PID: 1922
08-09 08:11:13.597: E/AndroidRuntime(1922): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.ehsan.myproject/com.ehsan.myproject.OpenedClass}: java.lang.ClassCastException: com.ehsan.myproject.OpenedClass cannot be cast to android.widget.RadioGroup$OnCheckedChangeListener
08-09 08:11:13.597: E/AndroidRuntime(1922): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2195)
08-09 08:11:13.597: E/AndroidRuntime(1922): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
08-09 08:11:13.597: E/AndroidRuntime(1922): at android.app.ActivityThread.access$800(ActivityThread.java:135)
08-09 08:11:13.597: E/AndroidRuntime(1922): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
08-09 08:11:13.597: E/AndroidRuntime(1922): at android.os.Handler.dispatchMessage(Handler.java:102)
08-09 08:11:13.597: E/AndroidRuntime(1922): at android.os.Looper.loop(Looper.java:136)
08-09 08:11:13.597: E/AndroidRuntime(1922): at android.app.ActivityThread.main(ActivityThread.java:5017)
08-09 08:11:13.597: E/AndroidRuntime(1922): at java.lang.reflect.Method.invokeNative(Native Method)
08-09 08:11:13.597: E/AndroidRuntime(1922): at java.lang.reflect.Method.invoke(Method.java:515)
08-09 08:11:13.597: E/AndroidRuntime(1922): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
08-09 08:11:13.597: E/AndroidRuntime(1922): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
08-09 08:11:13.597: E/AndroidRuntime(1922): at dalvik.system.NativeStart.main(Native Method)
08-09 08:11:13.597: E/AndroidRuntime(1922): Caused by: java.lang.ClassCastException: com.ehsan.myproject.OpenedClass cannot be cast to android.widget.RadioGroup$OnCheckedChangeListener
08-09 08:11:13.597: E/AndroidRuntime(1922): at com.ehsan.myproject.OpenedClass.initialize(OpenedClass.java:43)
08-09 08:11:13.597: E/AndroidRuntime(1922): at com.ehsan.myproject.OpenedClass.onCreate(OpenedClass.java:28)
08-09 08:11:13.597: E/AndroidRuntime(1922): at android.app.Activity.performCreate(Activity.java:5231)
08-09 08:11:13.597: E/AndroidRuntime(1922): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
08-09 08:11:13.597: E/AndroidRuntime(1922): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159)
08-09 08:11:13.597: E/AndroidRuntime(1922): ... 11 more
1 個解決方案
解決方案1
0 已采納 2014-08-09 11:34:23
嘗試這個..
像start.setOnClickListener(this);一樣初始化 ClickListener start.setOnClickListener(this); 對於Button
private void initialize() {
// TODO Auto-generated method stub
start = (Button) findViewById(R.id.bSA);
startFor = (Button) findViewById(R.id.bSAFR);
sendET = (EditText) findViewById(R.id.etSend);
gotAnswer = (TextView) findViewById(R.id.tvGot);
start.setOnClickListener(this);
startFor.setOnClickListener(this);
}
編輯
改變這個
selectionList.setOnCheckedChangeListener((android.widget.RadioGroup.OnCheckedChangeListener) this);
至
selectionList.setOnCheckedChangeListener(this);
Selenium找到了Web應用程序的“下一步”按鈕，但是click（）不起作用
[英]Selenium finds the “next” button of web application but click() doesn't work
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