android4.0 静默升级(后台升级)

要求静默升级的程序包名必须为com.dsplayer
1. android4.0/packages/apps/PackageInstaller/src/com/android/packageinstaller/InstallAppProgress.java
    private Handler mHandler = new Handler() {
            public void handleMessage(Message msg) {
            ......
            if (enabled) {
+                if (mAppInfo.packageName.equals("com.dsplayer")) {
+                    startActivity(mLaunchIntent);
+                    finish();
+                }

                mLaunchButton.setOnClickListener(InstallAppProgress.this);
            } else {
                mLaunchButton.setEnabled(false);
            }
            ......
        }
    }

2. android4.0/packages/apps/PackageInstaller/src/com/android/packageinstaller/PackageInstallerActivity.java

    private void initiateInstall() {
        String pkgName = mPkgInfo.packageName;
        // Check if there is already a package on the device with this name

        // but it has been renamed to something else.

        String[] oldName = mPm.canonicalToCurrentPackageNames(new String[] { pkgName });
        if (oldName != null && oldName.length > 0 && oldName[0] != null) {
            pkgName = oldName[0];
            mPkgInfo.setPackageName(pkgName);
        }
        // Check if package is already installed. display confirmation dialog if replacing pkg

        try {
            mAppInfo = mPm.getApplicationInfo(pkgName,
                    PackageManager.GET_UNINSTALLED_PACKAGES);
        } catch (NameNotFoundException e) {
            mAppInfo = null;
        }

    /*
    if (mAppInfo == null || getIntent().getBooleanExtra(Intent.EXTRA_ALLOW_REPLACE, false)) {
                      startInstallConfirm();
        } else {
                     if(localLOGV) Log.i(TAG, "Replacing existing package:"+
                                mPkgInfo.applicationInfo.packageName);
                                showDialogInner(DLG_REPLACE_APP);
        }
    */
    // 注释上面程序，添加下面程序。

+    if (pkgName.equals("com.dsplayer")) {
+        startInstall();
+    } else {
+        if (mAppInfo == null || getIntent().getBooleanExtra(Intent.EXTRA_ALLOW_REPLACE, false)) {
+            startInstallConfirm();
+        } else {
+ if(localLOGV)
+                Log.i(TAG, "Replacing existing package:"+ mPkgInfo.applicationInfo.packageName);
+            showDialogInner(DLG_REPLACE_APP);
+        }
+    }
    }

     // 在文件最后添加下面函数。

+    public void startInstall() {
+        // Start subactivity to actually install the application

+        Intent newIntent = new Intent();
+        newIntent.putExtra(PackageUtil.INTENT_ATTR_APPLICATION_INFO,
+                mPkgInfo.applicationInfo);
+        newIntent.setData(mPackageURI);
+        newIntent.setClass(this, InstallAppProgress.class);
+        String installerPackageName = getIntent().getStringExtra(Intent.EXTRA_INSTALLER_PACKAGE_NAME);
+        if (installerPackageName != null) {
+            newIntent.putExtra(Intent.EXTRA_INSTALLER_PACKAGE_NAME, installerPackageName);
+        }
+        if(localLOGV)
+            Log.i(TAG, "downloaded app uri="+mPackageURI);
+        startActivity(newIntent);
+        finish();
+    }