[移动开发]Android 10 定制apk安装界面

需要修改的文件都在frameworks\base\packages\PackageInstaller目录下

说明：PackageInstaller是一个完成的apk应用

它负责了apk的安装以及卸载的逻辑和页面展示

1.当我们点开安装apk的时候，就会跳转到

frameworks\base\packages\PackageInstaller\src\com\android\packageinstaller/InstallStart.java

        if (isSessionInstall) {
            nextActivity.setClass(this, PackageInstallerActivity.class);
        } else {
            Uri packageUri = intent.getData();

            if (packageUri != null && packageUri.getScheme().equals(
                    ContentResolver.SCHEME_CONTENT)) {
           
                nextActivity.setClass(this, InstallStaging.class);
            } else if (packageUri != null && packageUri.getScheme().equals(
                    PackageInstallerActivity.SCHEME_PACKAGE)) {
                nextActivity.setClass(this, PackageInstallerActivity.class);
            } else {
                Intent result = new Intent();
                result.putExtra(Intent.EXTRA_INSTALL_RESULT,
                        PackageManager.INSTALL_FAILED_INVALID_URI);
                setResult(RESULT_FIRST_USER, result);

                nextActivity = null;
            }
        }

从上面代码可以看出 当前页面只是中转 自身没有布局? 根据不同情况 会跳转到

PackageInstallerActivity或者?InstallStaging页面?

2.然后我们再来看看PackageInstallerActivity和InstallStaging

PackageInstallerActivity：

    private void bindUi() {
        mAlert.setIcon(mAppSnippet.icon);
        mAlert.setTitle(mAppSnippet.label);
        //这里设置了布局文件
        mAlert.setView(R.layout.install_content_view);
        mAlert.setButton(DialogInterface.BUTTON_POSITIVE, getString(R.string.install),
                (ignored, ignored2) -> {
                    if (mOk.isEnabled()) {
                        if (mSessionId != -1) {
                            mInstaller.setPermissionsResult(mSessionId, true);
                            finish();
                        } else {
                            startInstall();
                        }
                    }
                }, null);
        mAlert.setButton(DialogInterface.BUTTON_NEGATIVE, getString(R.string.cancel),
                (ignored, ignored2) -> {
                   Cancel and finish
                    setResult(RESULT_CANCELED);
                    if (mSessionId != -1) {
                        mInstaller.setPermissionsResult(mSessionId, false);
                    }
                    finish();
                }, null);
        setupAlert();

        mOk = mAlert.getButton(DialogInterface.BUTTON_POSITIVE);
        mOk.setEnabled(false);

InstallStaging

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);		
        mAlert.setIcon(R.drawable.ic_file_download);
        mAlert.setTitle(getString(R.string.app_name_unknown));
        mAlert.setView(R.layout.install_content_view);
        mAlert.setButton(DialogInterface.BUTTON_NEGATIVE, getString(R.string.cancel),
                (ignored, ignored2) -> {
                    if (mStagingTask != null) {
                        mStagingTask.cancel(true);
                    }
                    setResult(RESULT_CANCELED);
                    finish();
                }, null);
        setupAlert();	

发现这两个设置的布局为 R.layout.install_content_view

InstallStaging界面只有一个取消按钮，到这里结束了?

我们再来看看PackageInstallerActivity 的?startInstall()方法

    private 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, InstallInstalling.class);
         。。。
        startActivity(newIntent);
        finish();
    }

从以上发现最终跳转了InstallInstalling界面

我们再来看看InstallInstalling的布局代码：

           mAlert.setIcon(as.icon);
            mAlert.setTitle(as.label);
            mAlert.setView(R.layout.install_content_view);
            mAlert.setButton(DialogInterface.BUTTON_NEGATIVE, getString(R.string.cancel),
                    (ignored, ignored2) -> {
                        if (mInstallingTask != null) {
                            mInstallingTask.cancel(true);
                        }

                        if (mSessionId > 0) {
                            getPackageManager().getPackageInstaller().abandonSession(mSessionId);
                            mSessionId = 0;
                        }

                        setResult(RESULT_CANCELED);
                        finish();
                    }, null);
            setupAlert();
            requireViewById(R.id.installing).setVisibility(View.VISIBLE);

惊奇的发现 发现还是引用布局?R.layout.install_content_view

安装完成或者失败后 会跳转?InstallFailed或者InstallSuccess

最后发现还是引用布局?R.layout.install_content_view

结论：所有的安装界面都引用了当前布局，如果需要定制安装界面布局，只需要修改布局install_content_view 即可实现布局定制