关于安卓插件式开发

   网上找了很多关于插件式开发的资料  最值得研究意义的两种开源开发插件框架http://www.oschina.net/p/cjframeforandroid 与http://www.oschina.net/p/xcombine    另外还有一种非常简单的通过sharedUserId方式去实现。接下来讲的就是最方便的通过sharedUserId去实现。

  思路：在主app中与次app中设置同样的sharedUserId，在主app中通过这个id 找到其他次app的包名，通过包名开启其他次app。

需要注意的是 次app中的主activity的action是包名并且category设置成默认的。

  demo 下载地址http://download.csdn.net/detail/u012303938/8642017

  上代码：  主app通过一个按钮去调用一个次app（插件）。

     MainActivity.class

package com.example.plugin;
import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.graphics.Color;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends Activity {
private  Button button1;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        button1=(Button) findViewById(R.id.button1);
        button1.setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View arg0) {
				// TODO Auto-generated method stub
				attachPlugin(findPlugins());
			}
		});
    }

private List<PluginBean> findPlugins(){
		
		List<PluginBean> plugins=new ArrayList<PluginBean>();
		
		
		//遍历包名，来获取插件
		PackageManager pm=getPackageManager();
		
		
		List<PackageInfo> pkgs=pm.getInstalledPackages(PackageManager.GET_UNINSTALLED_PACKAGES);
		for(PackageInfo pkg	:pkgs){
			//包名
			String packageName=pkg.packageName;
			String sharedUserId= pkg.sharedUserId;
			
			//sharedUserId是开发时约定好的，这样判断是否为自己人
			if(!"main.plugin".equals(sharedUserId)||"com.example.plugin".equals(packageName))
				continue;
			
			
			//进程名
			String prcessName=pkg.applicationInfo.processName;
			
			//label，也就是appName了
			String label=pm.getApplicationLabel(pkg.applicationInfo).toString();
			
			
			PluginBean plug=new PluginBean();
			plug.setLabel(label);
			plug.setPakageName(packageName);
			plug.setPrcessName(prcessName);
			plug.setSharedUserId(sharedUserId);
			plugins.add(plug);
		}
		
		
		return plugins;
        
	}

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

	private void attachPlugin(List<PluginBean> plugins){
		Intent intent=new Intent();
		if(plugins!=null&&plugins.size()>0){
			intent.setAction(plugins.get(0).getPakageName());
			Toast.makeText(this, plugins.get(0).getPakageName(), 1).show();
			startActivity(intent);
		}else{
			Toast.makeText(this, "没有找到插件", 1).show();
		}
	
	}

}

存放插件的数据 pluginbean.class

package com.example.plugin;

public class PluginBean {
	private String pakageName;
	private String label;
	private String sharedUserId;
	public String getSharedUserId() {
		return sharedUserId;
	}
	public void setSharedUserId(String sharedUserId) {
		this.sharedUserId = sharedUserId;
	}
	public String getPrcessName() {
		return prcessName;
	}
	public void setPrcessName(String prcessName) {
		this.prcessName = prcessName;
	}
	private String prcessName;
	public String getPakageName() {
		return pakageName;
	}
	public void setPakageName(String pakageName) {
		this.pakageName = pakageName;
	}
	public String getLabel() {
		return label;
	}
	public void setLabel(String label) {
		this.label = label;
	}
	
	
}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.plugin"
    android:sharedUserId="main.plugin"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="19" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.plugin.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

MainActivity.calss

package com.example.plug_test;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.GridView;
import android.widget.SimpleAdapter;

public class MainActivity extends Activity {
	private GridView gridView1;
    private ArrayList<Map<String, Object>> list=new ArrayList<Map<String,Object>>();
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        findView();
    }


    private void findView() {
		// TODO Auto-generated method stub
    	for(int i=0;i<5;i++){
    		Map<String, Object> map=new HashMap<String, Object>();
    		map.put("apkName", "name"+i);
    		map.put("icon", R.drawable.ic_launcher);
    		list.add(map);
    	}
    	gridView1=(GridView) findViewById(R.id.gridView1);
    	SimpleAdapter adapter=new SimpleAdapter(this, list, R.layout.grid_item,
    			new String[]{"apkName","icon"}, new int []{R.id.tv_name,R.id.img});
    	gridView1.setAdapter(adapter);
	}


	@Override
    public boolean onCreateOptionsMenu(Menu menu) {
        
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.plug_test"
    android:sharedUserId="main.plugin"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="19" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.plug_test.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="com.example.plug_test" />

                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>
    </application>

</manifest>

关于安卓插件式开发

原文：http://blog.csdn.net/u012303938/article/details/45337457