一个Android程序 Helloworld

浅浅的花香味﹌ 2022-09-30 00:40 151阅读 0赞

HelloActivity.java

package mars.helloworld;

import android.app.Activity;  
import android.os.Bundle;  
import android.view.View;  
import android.widget.Button;  
import android.widget.TextView;

public class HelloActivity extends Activity \{  
 private Button myButton1 = null;  
 private Button myButton2 = null;  
 private TextView myEditText = null;  
 private TextView myTextView = null;  
    /\*\* Called when the activity is first created. \*/  
    @Override  
    public void onCreate(Bundle savedInstanceState) \{  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.main);//设置Activity的布局  
        myButton1 = (Button)findViewById(R.id.myButton1);//得到按钮对象s  
        myButton2 = (Button)findViewById(R.id.myButton2);  
        myEditText = (TextView)findViewById(R.id.myEditText);//得到TextView对象  
        myTextView = (TextView)findViewById(R.id.myTextView);  
        myButton1.setOnClickListener(new View.OnClickListener() \{//给按钮注册监听器  
     
   public void onClick(View v) \{  
    myTextView.setText(myEditText.getText());  
   \}  
  \});  
        myButton2.setOnClickListener(new View.OnClickListener() \{  
     
   public void onClick(View v) \{  
    myTextView.setText(new String());  
   \}  
  \});  
         
    \}  
\}

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>  
<manifest xmlns:android="[http://schemas.android.com/apk/res/android][http_schemas.android.com_apk_res_android]"  
      package="mars.helloworld"  
      android:versionCode="1"  
      android:versionName="1.0">  
    <uses-sdk android:minSdkVersion="4" />

</application>  
</manifest>

main.xml

<?xml version="1.0" encoding="utf-8"?>  
<LinearLayout xmlns:android="[http://schemas.android.com/apk/res/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/myEditText"  
 android:layout\_width="fill\_parent"  
 android:layout\_height="wrap\_content"  
    />  
<Button  
 android:id="@+id/myButton1"  
 android:layout\_width="fill\_parent"  
 android:layout\_height="wrap\_content"  
 android:text="@string/myButtonText1"  
 />  
<Button  
 android:id="@+id/myButton2"  
 android:layout\_width="fill\_parent"  
 android:layout\_height="wrap\_content"  
 android:text="@string/myButtonText2"  
 />  
<TextView   
 android:id="@+id/myTextView"  
    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, HelloActivity!</string>  
    <string name="app\_name">helloworld</string>  
    <string name="myButtonText1">Click Button One</string>  
    <string name="myButtonText2">Click Button Two</string>  
</resources>

[http_schemas.android.com_apk_res_android]: http://schemas.android.com/apk/res/android