android 加法程序
16lz
2022-05-29
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/one" android:layout_width="fill_parent" android:layout_height="wrap_content" /><TextView android:id="@+id/tv" android:layout_width="fill_parent" android:layout_height="wrap_content" /> <EditText android:id="@+id/two" android:layout_width="fill_parent" android:layout_height="wrap_content" /> <Button android:id="@+id/button" android:layout_width="fill_parent" android:layout_height="wrap_content" /></LinearLayout>
two.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/twotv" android:layout_width="fill_parent" android:layout_height="wrap_content" /></LinearLayout>
strings.xml
<?xml version="1.0" encoding="utf-8"?><resources> <string name="hello">Hello World, OneActivity!</string> <string name="app_name">运算</string> <string name="two_name">计算结果</string> <string name="button">按下我</string> <string name="textview">乘以</string> <string name="exit">退出</string> <string name="about">关于</string></resources>
OneActivity
package com.hufan;import android.app.Activity;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.view.View.*;import android.os.Bundle;import android.widget.*;import android.content.*;public class OneActivity extends Activity implements OnClickListener{ EditText et1,et2; TextView tv; Button b; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); et1=(EditText)findViewById(R.id.one); et1.setText("4"); tv=(TextView)findViewById(R.id.tv); tv.setText(R.string.textview); et2=(EditText)findViewById(R.id.two); et2.setText("5"); b=(Button)findViewById(R.id.button); b.setOnClickListener(this); b.setText(R.string.button); }@Overridepublic boolean onCreateOptionsMenu(Menu menu) {menu.add(0,1,1,R.string.exit);menu.add(0,2,3,R.string.about);return super.onCreateOptionsMenu(menu);}@Overridepublic boolean onOptionsItemSelected(MenuItem item) {if(item.getItemId()==1){this.finish();}return super.onOptionsItemSelected(item);}@Overridepublic void onClick(View v) {String oneStr=et1.getText().toString();String twoStr=et2.getText().toString();Intent in=new Intent();in.putExtra("one", oneStr);in.putExtra("two", twoStr);in.setClass(this, TwoActivity.class);this.startActivity(in);}}
TwoActivity
package com.hufan;import android.app.Activity;import android.view.View;import android.view.View.*;import android.os.Bundle;import android.widget.*;import android.content.*;public class TwoActivity extends Activity{TextView twotv;public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.two); twotv=(TextView)findViewById(R.id.twotv); Intent in=getIntent(); String one1=in.getStringExtra("one"); String two2=in.getStringExtra("two"); int a=Integer.parseInt(one1); int b=Integer.parseInt(two2); int c=a*b; twotv.setText(c+"");}} AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.hufan" 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=".OneActivity" 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=".TwoActivity" android:label="@string/two_name"> </activity> </application></manifest>
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