添加菜单时总是运行时错误 The application Activity03(process mars.activity) has stopped unexpectedly.please try again
//Activity03.java
package mars.activity;import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;//1.在Activity03当中,要声明四个控件
//2.要为其中的两个控件设置显示值
//3.创建一个监听器类,监听按钮按下的动作
//4.将监听器类的对象绑定在按钮对象上
public class Activity03 extends Activity {
/** Called when the activity is first created. */
private EditText factorOne;
private EditText factorTwo;
private TextView symbol;
private Button calculate;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//根据控件的ID来取得代表控件的对象
factorOne = (EditText)findViewById(R.id.factorOne);
factorTwo = (EditText)findViewById(R.id.factorTwo);
symbol = (TextView)findViewById(R.id.symbol);
calculate = (Button)findViewById(R.id.calculate);
//为symbol和calculate设置显示的值
// symbol.setText("乘以");
// calculate.setText("计算");
symbol.setText(R.string.symbol);
calculate.setText(R.string.calculate);
//将计算监听器的对象绑定到按钮对象上
calculate.setOnClickListener(new CalculateListener());
}
//当客户点击MENU按钮的时候,调用该方法
@Override
public boolean onCreateOptionsMenu(Menu menu) {
menu.add(0,1,1,R.string.exit);
menu.add(0,2,2,R.string.about);
return super.onCreateOptionsMenu(menu);
}
//当客户点击菜单当中的某一个选项是,会调用该方法
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if(item.getItemId() == 1){
finish();
}
return super.onOptionsItemSelected(item);
}
//计算监听器类
class CalculateListener implements OnClickListener { public void onClick(View v) {
// TODO Auto-generated method stub
//取得两个EditText控件的值
String factorOneStr = factorOne.getText().toString();
String factorTwoStr = factorTwo.getText().toString();
//将这两个值存放到Intent对象中
Intent intent = new Intent();
intent.putExtra("one",factorOneStr);
intent.putExtra("two",factorTwoStr);
intent.setClass(Activity03.this,ResultActivity.class);
//使用这个Intent对象来启动ResultActivity
Activity03.this.startActivity(intent);
}
}
}
//ResultActivity.java
package mars.activity;import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.TextView;
//1.接收从Activity03当中传递的值
//2.计算两个值的积
//3.将计算的结果显示在Activity上
public class ResultActivity extends Activity {
private TextView resultView = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.result);
resultView = (TextView)findViewById(R.id.result);
//得到Intent对象当中的值
Intent intent = getIntent();
String factorOneStr = intent.getStringExtra("one");
String factorTwoStr = intent.getStringExtra("two");
int factorOneInt = Integer.parseInt(factorOneStr);
int factorTwoInt = Integer.parseInt(factorTwoStr);
//计算两个值的积
int result = factorOneInt * factorTwoInt;
//显示计算值到Activity
resultView.setText(result + "");
}}
//main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<EditText
android:id="@+id/factorOne"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
<TextView
android:id="@+id/symbol"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello"
/>
<EditText
android:id="@+id/factorTwo"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
<Button
android:id="@+id/calculate"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>
//result.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:id="@+id/result"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>
//string.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="hello">Hello World, Activity03!</string>
<string name="app_name">Activity03</string>
<string name="resultLabel">result</string>
<string name="symbol">乘以</string>
<string name="calculate">计算</string>
<string name="exit">退出</string>
<string name="about">关于</string>
</resources>
//AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="mars.activity"
android:versionCode="1"
android:versionName="1.0">
<uses-sdk android:minSdkVersion="4" /> <application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".Activity03"
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=".ResultActivity" android:label="@string/resultLabel"/>
</application>
</manifest>
//Activity03.java
package mars.activity;import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;//1.在Activity03当中,要声明四个控件
//2.要为其中的两个控件设置显示值
//3.创建一个监听器类,监听按钮按下的动作
//4.将监听器类的对象绑定在按钮对象上
public class Activity03 extends Activity {
/** Called when the activity is first created. */
private EditText factorOne;
private EditText factorTwo;
private TextView symbol;
private Button calculate;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//根据控件的ID来取得代表控件的对象
factorOne = (EditText)findViewById(R.id.factorOne);
factorTwo = (EditText)findViewById(R.id.factorTwo);
symbol = (TextView)findViewById(R.id.symbol);
calculate = (Button)findViewById(R.id.calculate);
//为symbol和calculate设置显示的值
// symbol.setText("乘以");
// calculate.setText("计算");
symbol.setText(R.string.symbol);
calculate.setText(R.string.calculate);
//将计算监听器的对象绑定到按钮对象上
calculate.setOnClickListener(new CalculateListener());
}
//当客户点击MENU按钮的时候,调用该方法
@Override
public boolean onCreateOptionsMenu(Menu menu) {
menu.add(0,1,1,R.string.exit);
menu.add(0,2,2,R.string.about);
return super.onCreateOptionsMenu(menu);
}
//当客户点击菜单当中的某一个选项是,会调用该方法
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if(item.getItemId() == 1){
finish();
}
return super.onOptionsItemSelected(item);
}
//计算监听器类
class CalculateListener implements OnClickListener { public void onClick(View v) {
// TODO Auto-generated method stub
//取得两个EditText控件的值
String factorOneStr = factorOne.getText().toString();
String factorTwoStr = factorTwo.getText().toString();
//将这两个值存放到Intent对象中
Intent intent = new Intent();
intent.putExtra("one",factorOneStr);
intent.putExtra("two",factorTwoStr);
intent.setClass(Activity03.this,ResultActivity.class);
//使用这个Intent对象来启动ResultActivity
Activity03.this.startActivity(intent);
}
}
}
//ResultActivity.java
package mars.activity;import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.TextView;
//1.接收从Activity03当中传递的值
//2.计算两个值的积
//3.将计算的结果显示在Activity上
public class ResultActivity extends Activity {
private TextView resultView = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.result);
resultView = (TextView)findViewById(R.id.result);
//得到Intent对象当中的值
Intent intent = getIntent();
String factorOneStr = intent.getStringExtra("one");
String factorTwoStr = intent.getStringExtra("two");
int factorOneInt = Integer.parseInt(factorOneStr);
int factorTwoInt = Integer.parseInt(factorTwoStr);
//计算两个值的积
int result = factorOneInt * factorTwoInt;
//显示计算值到Activity
resultView.setText(result + "");
}}
//main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<EditText
android:id="@+id/factorOne"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
<TextView
android:id="@+id/symbol"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello"
/>
<EditText
android:id="@+id/factorTwo"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
<Button
android:id="@+id/calculate"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>
//result.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:id="@+id/result"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>
//string.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="hello">Hello World, Activity03!</string>
<string name="app_name">Activity03</string>
<string name="resultLabel">result</string>
<string name="symbol">乘以</string>
<string name="calculate">计算</string>
<string name="exit">退出</string>
<string name="about">关于</string>
</resources>
//AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="mars.activity"
android:versionCode="1"
android:versionName="1.0">
<uses-sdk android:minSdkVersion="4" /> <application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".Activity03"
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=".ResultActivity" android:label="@string/resultLabel"/>
</application>
</manifest>
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android:id="@+id/symbol"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello"
/>
试试删掉android:text="@string/hello",呵呵
public boolean onCreateOptionsMenu(Menu menu) {
menu.add(0,1,1,R.string.exit);
menu.add(0,2,2,R.string.about);
return super.onCreateOptionsMenu(menu);
}@Override
public boolean onOptionsItemSelected(MenuItem item) {
if(item.getItemId() == 1){
finish();
}
return super.onOptionsItemSelected(item);
}