Android PackageInstaller：安装应用的应用

PackageInstaller作为安装应用的应用，在Android中的地位有些特殊。

看看在AndroidManifest.xml中的声明：

可以看到对application/vnd.android.package-archive这个mime的处理，还有android.intent.action.INSTALL_PACKAGE这个action的处理。

在文件管理器中点击apk文件，或者发送以上intent-filter中对应的action，就会调用PackageInstaller。

1.只安装指定前缀包名的应用

我们可以在initiateInstall()这个函数中，通过包名对将要安装的应用进行管控，参考代码如下：

    private void initiateInstall() {        String pkgName = mPkgInfo.packageName;Log.v("AZ","[initiateInstall]pkgName:" + pkgName);if(pkgName.startsWith("com.zms")){// 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.packageName = pkgName;mPkgInfo.applicationInfo.packageName = pkgName;}// Check if package is already installed. display confirmation dialog if replacing pkgtry {// This is a little convoluted because we want to get all uninstalled// apps, but this may include apps with just data, and if it is just// data we still want to count it as "installed".mAppInfo = mPm.getApplicationInfo(pkgName,PackageManager.GET_UNINSTALLED_PACKAGES);if ((mAppInfo.flags&ApplicationInfo.FLAG_INSTALLED) == 0) {mAppInfo = null;}} catch (NameNotFoundException e) {mAppInfo = null;}mInstallFlowAnalytics.setReplace(mAppInfo != null);mInstallFlowAnalytics.setSystemApp((mAppInfo != null) && ((mAppInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0));startInstallConfirm();}else{finish();}    }

以上代码的效果就是，只安装包名以“com.zms”开头的应用。其他的不会出现安装界面，直接finish()。

2.PackageInstaller安装完某个应用，自动打开：

packages/apps/PackageInstaller/src/com/android/packageinstaller/InstallAppProgress.java

    private Handler mHandler = new Handler() {        public void handleMessage(Message msg) {            switch (msg.what) {                case INSTALL_COMPLETE:                    mInstallFlowAnalytics.setFlowFinishedWithPackageManagerResult(msg.arg1);                    if (getIntent().getBooleanExtra(Intent.EXTRA_RETURN_RESULT, false)) {                        Intent result = new Intent();                        result.putExtra(Intent.EXTRA_INSTALL_RESULT, msg.arg1);                        setResult(msg.arg1 == PackageManager.INSTALL_SUCCEEDED                                ? Activity.RESULT_OK : Activity.RESULT_FIRST_USER,                                        result);                        finish();                        return;                    }                    // Update the status text                    mProgressBar.setVisibility(View.INVISIBLE);                    // Show the ok button                    int centerTextLabel;                    int centerExplanationLabel = -1;                    LevelListDrawable centerTextDrawable = (LevelListDrawable) getResources()                            .getDrawable(R.drawable.ic_result_status);                    if (msg.arg1 == PackageManager.INSTALL_SUCCEEDED) {                        mLaunchButton.setVisibility(View.VISIBLE);                        centerTextDrawable.setLevel(0);                        centerTextLabel = R.string.install_done;                        // Enable or disable launch button                        mLaunchIntent = getPackageManager().getLaunchIntentForPackage(                                mAppInfo.packageName);                        boolean enabled = false;                        if(mLaunchIntent != null) {                            List list = getPackageManager().                                    queryIntentActivities(mLaunchIntent, 0);                            if (list != null && list.size() > 0) {                                enabled = true;                                                   }                        if (enabled) {                            // ZMS:Add for opening app automatically START                            if(mAppInfo.packageName.equals("com.zms.demo")){                               startActivity(mLaunchIntent);                            }                            // ZMS:END                            mLaunchButton.setOnClickListener(InstallAppProgress.this);                        } else {                            mLaunchButton.setEnabled(false);                        }                    } else if (msg.arg1 == PackageManager.INSTALL_FAILED_INSUFFICIENT_STORAGE){                        /// M: [ALPS00269830][ICS-TDD][Symbio][Free test] Assertion while playing music when downloading apks @{                        if (!isFinishing()) {                            Log.d(TAG, "!isFinishing()");   // Check to see whether this activity is in the process of finishing                        showDialogInner(DLG_OUT_OF_SPACE);                        }                        /// @}                        return;                    } else {                        // Generic error handling for all other error codes.                        centerTextDrawable.setLevel(1);                        centerExplanationLabel = getExplanationFromErrorCode(msg.arg1);                        centerTextLabel = R.string.install_failed;                        mLaunchButton.setVisibility(View.INVISIBLE);                    }                    if (centerTextDrawable != null) {                    centerTextDrawable.setBounds(0, 0,                            centerTextDrawable.getIntrinsicWidth(),                            centerTextDrawable.getIntrinsicHeight());                        mStatusTextView.setCompoundDrawablesRelative(centerTextDrawable, null,                                null, null);                    }                    mStatusTextView.setText(centerTextLabel);                    if (centerExplanationLabel != -1) {                        mExplanationTextView.setText(centerExplanationLabel);                        mExplanationTextView.setVisibility(View.VISIBLE);                    } else {                        mExplanationTextView.setVisibility(View.GONE);                    }                    mDoneButton.setOnClickListener(InstallAppProgress.this);                    mOkPanel.setVisibility(View.VISIBLE);                    break;                default:                    break;            }        }    };

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