關於安卓外掛程式式開發，安卓外掛程式式開發

關於安卓外掛程式式開發，安卓外掛程式式開發

   網上找了很多關於外掛程式式開發的資料  最值得研究意義的兩種開源開發外掛程式架構http://www.oschina.net/p/cjframeforandroid 與http://www.oschina.net/p/xcombine    另外還有一種非常簡單的通過sharedUserId方式去實現。接下來講的就是最方便的通過sharedUserId去實現。

  思路：在主app中與次app中設定同樣的sharedUserId，在主app中通過這個id 找到其他次app的包名，通過包名開啟其他次app。

需要注意的是 次app中的主activity的action是包名並且category設定成預設的。

  demo http://download.csdn.net/detail/u012303938/8642017

  上代碼：  主app通過一個按鈕去調用一個次app（外掛程式）。

     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() {@Overridepublic void onClick(View arg0) {// TODO Auto-generated method stubattachPlugin(findPlugins());}});    }private List<PluginBean> findPlugins(){List<PluginBean> plugins=new ArrayList<PluginBean>();//遍曆包名，來擷取外掛程式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是開發時約定好的，這樣判斷是否為自己人if(!"main.plugin".equals(sharedUserId)||"com.example.plugin".equals(packageName))continue;//進程名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, "沒有找到外掛程式", 1).show();}}}

存放外掛程式的資料 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;}}

 主app在資訊清單檔中設定sharedUserId

<?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>

次app寫了一個載入gridview的activity

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);    }}

在資訊清單檔中設定ID  並將主activity意圖設定包名並隱藏掉

<?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>