Android--软件安装器Install

我这里有一个Android2.1版本的软件安装器，只要把apk导入虚拟手机的SD卡，在EditText中填入软件的名称(如:youku.apk),单击安装即可。

publicclassInstallActivityextendsActivity{
 privateEditTextfilenameText;

 @Override
 publicvoidonCreate(BundlesavedInstanceState){
 super.onCreate(savedInstanceState);
setContentView(R.layout.main);

 filenameText=(EditText)this.findViewById(R.id.filename);
 Buttonbutton=(Button)this.findViewById(R.id.button);
 button.setOnClickListener(newView.OnClickListener(){
 @Override
 publicvoidonClick(Viewv){
 Intentintent=newIntent();//隐式意图
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.setAction(android.content.Intent.ACTION_VIEW);
 Uriuri=Uri.fromFile(newFile(Environment.getExternalStorageDirectory(),
filenameText.getText().toString()));
 intent.setDataAndType(uri,"application/vnd.android.package-archive");
startActivity(intent);
}
});
}
}

public class InstallActivity extends Activity {
	private EditText filenameText ;
	
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        filenameText = (EditText) this.findViewById(R.id.filename);
        Button button = (Button) this.findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {			
			@Override
			public void onClick(View v) {
				Intent intent = new Intent();   //隐式意图
				intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
				intent.setAction(android.content.Intent.ACTION_VIEW);
				Uri uri = Uri.fromFile(new File(Environment.getExternalStorageDirectory(),
						filenameText.getText().toString()));
				intent.setDataAndType(uri, "application/vnd.android.package-archive");
				startActivity(intent);
			}
		});
    }
}

<?xmlversion="1.0"encoding="utf-8"?>
 <LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"
 android:orientation="vertical"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent"
 >
 <TextView
 android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 android:text="安装文件"
 />

 <EditText
 android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 android:text="videoplayer.apk"
 android:id="@+id/filename"
 />

 <Button
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:text="安装"
 android:id="@+id/button"
 />
 </LinearLayout>

<?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:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="安装文件"
    />
    
    <EditText
	    android:layout_width="fill_parent" 
	    android:layout_height="wrap_content" 
	    android:text="videoplayer.apk"
	    android:id="@+id/filename"
	    />
	    
	    <Button
		    android:layout_width="wrap_content" 
		    android:layout_height="wrap_content" 
		    android:text="安装"
		    android:id="@+id/button"
		    />
</LinearLayout>