android應用後臺安裝，靜默安裝的代碼實現方法

首先，你要有linux環境或其他可以mmm交叉編譯的環境，因爲這個用到的是隱藏api，SDK中沒有的，ecilipse裏面會提示包不存在，但交叉編譯可以，如果你不知道

 

import android.app.Activity;
import android.os.Bundle;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.content.pm.IPackageInstallObserver;
import android.content.res.Resources;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import android.os.Environment;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ProgressBar;
import android.widget.TextView;
public class InstallActivity extends Activity {
    /** Called when the activity is first created. */
    private Button btn2=null;
    private final int INSTALL_COMPLETE = 1;
    final static int SUCCEEDED = 1;
    final static int FAILED = 0;
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        btn=(Button) findViewById(R.id.btn2);
        btn2.setOnClickListener(listener2);
}
 private OnClickListener listener2=new  OnClickListener(){
        public void onClick(View v) {
            String fileName = Environment.getExternalStorageDirectory() +  "/baidu/"+"UC.apk"; 
            Uri uri = Uri.fromFile(new File(fileName));

            int installFlags = 0;
            PackageManager pm = getPackageManager();
            try {
                PackageInfo pi = pm.getPackageInfo("com.uc.browser", 
                        PackageManager.GET_UNINSTALLED_PACKAGES);
                if(pi != null) {
                    installFlags |= PackageManager.INSTALL_REPLACE_EXISTING;
                }
            } catch (NameNotFoundException e) {
            }

//            String installerPackageName = getIntent().getStringExtra(
//                    Intent.EXTRA_INSTALLER_PACKAGE_NAME);
            
            PackageInstallObserver observer = new PackageInstallObserver();
            pm.installPackage(uri, observer, installFlags, "com.uc.browser");
 

        }
    };
    
    class PackageInstallObserver extends IPackageInstallObserver.Stub {
        public void packageInstalled(String packageName, int returnCode) {
            Message msg = mHandler.obtainMessage(INSTALL_COMPLETE);
            msg.arg1 = returnCode;
            mHandler.sendMessage(msg);
        }
    };
    
    private Handler mHandler = new Handler() {
        public void handleMessage(Message msg) {
            switch (msg.what) {
                case INSTALL_COMPLETE:
                    // Update the status text
                    // Show the ok button
                    int centerTextLabel;
                    Drawable centerTextDrawable = null;
                    if(msg.arg1 == SUCCEEDED) {
                        
                    } else {}
                    if (centerTextDrawable != null) {}

                    break;
                default:
                    break;
            }
        }
    };
   
}

重點是要實現一個這個類PackageInstallObserver，另外要注意import android.content.pm.……的那些包一定要導入。android.mk文件如下

LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)

LOCAL_MODULE_TAGS := user

LOCAL_SRC_FILES := $(call all-subdir-java-files)

LOCAL_PACKAGE_NAME := InstallActivity
LOCAL_CERTIFICATE := platform

include $(BUILD_PACKAGE)

重點是LOCAL_CERTIFICATE := platform要對

另外編譯的時候有可能會報R.java類重複錯誤，把你工程下gen文件夾刪除即可，不會影響編譯，傳說中會在別的地方自動生成^……

這個在2.1上編譯通過可以用，後臺安裝可以實現，後臺卸載也可以實現