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   源码介绍

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package androidStartApp.pack;

import java.util.List;

import android.app.Activity;
import android.content.ComponentName;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.content.pm.ResolveInfo;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;

public class androidStartApp extends Activity {
	/** Called when the activity is first created. */
	private EditText editText;
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		Button btButton = (Button) findViewById(R.id.Button01);
		editText = (EditText) findViewById(R.id.EditText01);
		
		btButton.setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				openApp(editText.getText().toString());
			}
		});
		
	}

	private boolean openApp(String packageName) {
		PackageInfo pi = null;
		try {
			pi = getPackageManager().getPackageInfo(packageName, 0);
		} catch (NameNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			return false;
		}

		Intent resolveIntent = new Intent(Intent.ACTION_MAIN, null);
		resolveIntent.addCategory(Intent.CATEGORY_LAUNCHER);
		resolveIntent.setPackage(pi.packageName);
		PackageManager pm = this.getPackageManager();
		List<ResolveInfo> apps = pm.queryIntentActivities(resolveIntent, 0);

		ResolveInfo ri = apps.iterator().next();
		if (ri != null) {
			String packName = ri.activityInfo.packageName;
			String className = ri.activityInfo.name;

			Intent intent = new Intent(Intent.ACTION_MAIN);
			intent.addCategory(Intent.CATEGORY_LAUNCHER);
			ComponentName cn = new ComponentName(packName, className);

			intent.setComponent(cn);
			startActivity(intent);
		}
		return true;
	}
}