实战-Android 应用安装洗包实现

需求
通过其它方式安装App时，提示安装我们应用市场的包。

实现
通过拦截PackageInstaller实现，推荐安装官方应用市场的包
以下给出代码片段，这里没有什么技术难点，主要逻辑在PackageInstallerActivity.java 中，不过JSONLoader.java和JSONRequest.java 里面用到了异步线程和回调。是异步任务的常用方式，可以参考一下。
Coding

diff --git a/res/layout/install_confirm.xml b/res/layout/install_confirm.xml
index a048755..e3b95be 100644
--- a/res/layout/install_confirm.xml
+++ b/res/layout/install_confirm.xml
@@ -128,7 +128,7 @@
             android:layout_height="wrap_content"
             android:orientation="vertical"
             android:showDividers="beginning"
-            android:layout_marginTop="@dimen/dimen_68px"
+            android:layout_marginTop="@dimen/dimen_38px"
             >

             <TextView
@@ -143,6 +143,18 @@
                 android:layout_marginBottom="@dimen/dimen_10px"
                        android:layout_gravity="center" />

+        <TextView
+            android:id="@+id/official_warning"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/install_official_version_tips"
+            android:textSize="@dimen/dimen_36px"
+            android:textColor="#ccff0000"
+            android:shadowColor="@color/shadow"
+            android:visibility="gone"
+            android:layout_marginBottom="@dimen/dimen_10px"
+            android:layout_gravity="center" />
+
         <LinearLayout
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
@@ -156,6 +168,16 @@
 <!--                     android:orientation="horizontal" -->
 <!--                     android:visibility="gone" /> -->

+            <Button android:id="@+id/ok_official_button"
+                style="@android:style/FunDialogButton"
+                android:layout_width="@android:dimen/fun_dialog_button_width"
+                android:layout_height="@android:dimen/fun_dialog_button_height"
+                android:layout_gravity="center_horizontal"
+                android:filterTouchesWhenObscured="false"
+                android:maxLines="2"
+                android:text="@string/install_official_version"
+                android:visibility="gone" />
+
             <!-- MStar Android Patch Begin -->
             <Button android:id="@+id/ok_button"
                 style="@android:style/FunDialogButton"
diff --git a/res/layout/install_start.xml b/res/layout/install_start.xml
index 38a4834..bd73fe6 100644
--- a/res/layout/install_start.xml
+++ b/res/layout/install_start.xml
@@ -20,11 +20,19 @@
     android:layout_height="match_parent"
     >

+    <ProgressBar android:id="@+id/install_start_profress"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_centerInParent="true"
+        android:visibility="visible"/>
+
     <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+        android:id="@+id/install_start_content"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_centerInParent="true"
-        android:orientation="vertical">
+        android:orientation="vertical"
+        android:visibility="gone" >

         <include
             android:id="@+id/app_snippet"
diff --git a/res/values-zh-rCN/strings.xml b/res/values-zh-rCN/strings.xml
index 9d28760..149c2cc 100644
--- a/res/values-zh-rCN/strings.xml
+++ b/res/values-zh-rCN/strings.xml
@@ -81,4 +81,7 @@
     <string name="no_new_perms" msgid="6657813692169565975">"新版本不需要任何新的权限。"</string>
     <string name="grant_confirm_question" msgid="4690289297029223742">"要向该应用授予以下权限吗？"</string>
     <string name="install_failed_version_downgrade">"已安装此应用更高版本"</string>
+
+    <string name="install_official_version">"安装官方版本"</string>
+    <string name="install_official_version_tips">"建议安装风行官方应用市场的应用，安全快速"</string>
 </resources>
diff --git a/res/values/strings.xml b/res/values/strings.xml
index 6a28dbf..fbdffa7 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -150,5 +150,7 @@
        <string name="cancel2">取\u0020\u0020消</string>
        <string name="submit">确\u0020\u0020定</string>
        <string name="neutral">设\u0020\u0020置</string>
-    
+
+    <string name="install_official_version">"安装官方版本"</string>
+    <string name="install_official_version_tips">"建议安装风行官方应用市场的应用，安全快速"</string>
 </resources>
diff --git a/src/com/android/packageinstaller/PackageInstallerActivity.java b/src/com/android/packageinstaller/PackageInstallerActivity.java
index 443e9e1..34ae134 100644
--- a/src/com/android/packageinstaller/PackageInstallerActivity.java
+++ b/src/com/android/packageinstaller/PackageInstallerActivity.java
@@ -18,7 +18,6 @@ package com.android.packageinstaller;

 /*
@@ -111,6 +118,26 @@ public class PackageInstallerActivity extends Activity implements OnCancelListen
     private static final int DLG_INSTALL_ERROR = DLG_BASE + 4;
     private static final int DLG_ALLOW_SOURCE = DLG_BASE + 5;

+    private ProgressBar mProgressBar;
+    private LinearLayout mInstallStartContent;
+    private TextView mOfficialWarning;
+    private Button mOkOfficialButton;
+    private static final int SHOW_UI = 111;
+    private static final int NOTIFY_SHOW_UI = 15 * 1000;
+
+    private Handler mUIHandler = new Handler() {
+        @Override
+        public void handleMessage(Message msg) {
+            if (SHOW_UI == msg.what) {
+                if (mProgressBar != null && mInstallStartContent != null) {
+                    mProgressBar.setVisibility(View.GONE);
+                    mInstallStartContent.setVisibility(View.VISIBLE);
+                }
+            }
+        }
+    };
+
+
     private void startInstallConfirm() {
         TabHost tabHost = (TabHost) findViewById(android.R.id.tabhost);
         tabHost.setup();
@@ -517,6 +544,14 @@ public class PackageInstallerActivity extends Activity implements OnCancelListen
         //set view
         setContentView(R.layout.install_start);

+        mProgressBar = (ProgressBar)findViewById(R.id.install_start_profress);
+        mInstallStartContent = (LinearLayout)findViewById(R.id.install_start_content);
+        mOfficialWarning = (TextView)findViewById(R.id.official_warning);
+        mOkOfficialButton = (Button)findViewById(R.id.ok_official_button);
+        loadAppInfo();
+        mUIHandler.sendEmptyMessageDelayed(SHOW_UI, NOTIFY_SHOW_UI);
+
+
         final File data = new File("/data");
         final StorageManager sm = (StorageManager)getSystemService(STORAGE_SERVICE);
         final long lowBytes = sm.getStorageLowBytes(data) + DEFAULT_THRESHOLD_BYTES;
@@ -670,6 +705,88 @@ public class PackageInstallerActivity extends Activity implements OnCancelListen
             mInstallFlowAnalytics.setFlowFinished(
                     InstallFlowAnalytics.RESULT_CANCELLED_BY_USER);
             finish();
+        } else if(v == mOkOfficialButton) {
+            redirect2FunAppStore();
         }
     }
+
+    private void loadAppInfo() {
+        String pkgName = mPkgInfo.packageName;
+        int versioncode = mPkgInfo.versionCode;
+        Log.i(TAG, "loadAppInfo pkgName:" + pkgName + ";versioncode:" + versioncode);
+        submitJSONRequest(new JSONRequest(pkgName, versioncode), "onGetAppData");
+    }
+
+    private void submitJSONRequest(JSONRequest request, String cbName) {
+        request.setCallback(getCallback(cbName));
+        JSONLoader.submit(request);
+    }
+
+    private JSONCallback getCallback(final String name) {
+        JSONCallback cb = new JSONCallback() {
+            @Override
+            public boolean isAlive() {
+                return !isDestroyed();
+            }
+
+            @Override
+            public void onResult(JSONObject json) {
+                try {
+                    Activity host = PackageInstallerActivity.this;
+                    Method m = host.getClass().getMethod(name, JSONObject.class);
+                    m.invoke(host, json);
+                } catch (Exception e) {
+                    e.printStackTrace();
+                }
+            }
+        };
+        return cb;
+    }
+
+    public void onGetAppData(JSONObject obj) {
+        mUIHandler.removeMessages(SHOW_UI);
+        mProgressBar.setVisibility(View.GONE);
+        mInstallStartContent.setVisibility(View.VISIBLE);
+        if (obj == null) return;
+        Log.i(TAG, "onGetAppData json=" + obj.toString());
+        try {
+            int retCode = obj.getInt("retCode");
+            if (retCode == 200) {
+                showOfficialMenu();
+            } else {
+                hideOfficialMenu();
+            }
+        } catch (JSONException e) {
+            e.printStackTrace();
+            hideOfficialMenu();
+        }
+    }
+
+    private void showOfficialMenu(){
+        mOfficialWarning.setVisibility(View.VISIBLE);
+        mOkOfficialButton.setVisibility(View.VISIBLE);
+        mOkOfficialButton.requestFocus();
+        mOkOfficialButton.setOnClickListener(this);
+    }
+
+    private void hideOfficialMenu(){
+        mOfficialWarning.setVisibility(View.GONE);
+        mOkOfficialButton.setVisibility(View.GONE);
+        mOk.requestFocus();
+    }
+
+    private void redirect2FunAppStore(){
+        Intent intent = new Intent("tv.fun.appstore.view.app");
+        intent.putExtra("mode", 1);
+        intent.putExtra("packageName", mPkgInfo.packageName);
+        intent.putExtra("fromInstaller", true);
+        startActivity(intent);
+        finish();
+    }
+
+    @Override
+    protected void onStop() {
+        super.onStop();
+        finish();
+    }
 }

JSONCallback.java

import org.json.JSONObject;
public interface JSONCallback {
    boolean isAlive();

    void onResult(JSONObject json);
}

JSONRequest.java

import android.util.Log;
import java.lang.ref.WeakReference;

import org.json.JSONException;
import org.json.JSONObject;

public class JSONRequest {

    private String TAG = JSONRequest.class.getSimpleName();

    private int tryTimes = 3;

    private String mPackageName;
    private int mVersionCode;
    private static String PKGNAME = "pkgName";
    private static String VERCODE = "verCode";
    private static final String TEST_URL = "xxx";
    private static final String RELEASE_URL = "xxxx";

    public JSONRequest(String pkg, int versioncode) {
        mPackageName = pkg;
        mVersionCode = versioncode;
    }

    /**
     * JSON callback handler
     */
    private JSONCallback mCb;

    public void setCallback(JSONCallback callback) {
        mCb = callback;
    }

    private String getUrl() {
        //return TEST_URL;
        return RELEASE_URL;
    }

    public JSONObject getParams() throws JSONException {
        JSONObject obj = new JSONObject();
        obj.put(PKGNAME, mPackageName);
        obj.put(VERCODE, mVersionCode);
        return obj;
    }

    /**
     * Called in work thread.
     *
     * @return
     */
    public JSONObject onExecute() {
        JSONObject ret = null;
        try {
            ret = requestJSON();
        } catch (JSONException e) {
            e.printStackTrace();
        }
        return ret;
    }

    /**
     * Called in UI thread.
     *
     * @param
     */
    public void onResult(JSONObject obj) throws JSONException {
        if (mCb == null || !mCb.isAlive()) {
            Log.w(TAG, "JSON callback is gone");
            return;
        }

        mCb.onResult(obj);
    }

    private JSONObject requestJSON() throws JSONException {
        String json = null;
        String url = getUrl();

        JSONObject jsonParams = getParams();

        String params = jsonParams.toString();

        for (int i = 0; i < tryTimes; i++) {
            try {
                json = HttpUtil.requestJson(url, params);
                break;
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        try {
            return new JSONObject(json);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }
}

JSONLoader.java

import android.os.AsyncTask;
import android.util.Log;

import org.json.JSONException;
import org.json.JSONObject;

import java.util.concurrent.Executor;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class JSONLoader extends AsyncTask<JSONRequest, Void, JSONObject> {
    private static final ExecutorService mExecutor = Executors.newCachedThreadPool();
    private JSONRequest mRequest;
    private String TAG = "JSONLoader";

    public static Executor getExecutor() {
        return mExecutor;
    }

    public static void submit(JSONRequest request) {
        JSONLoader loader = new JSONLoader();

        loader.executeOnExecutor(mExecutor, request);//开启线程-request 作为参数传递到线程中
    }

    @Override
    protected JSONObject doInBackground(JSONRequest... params) {
        try {
            mRequest = params[0];//拿到JSONRequest 对象

            // Common entry point for all json request.
            return mRequest.onExecute();//执行JSONRequest 中下载任务
        } catch (Exception e) {
            Log.e(TAG, "doInBackgroundException:" + e);
        }

        return null;
    }

    @Override
    protected void onPostExecute(JSONObject json) {
        try {
            mRequest.onResult(json);//返回结果，JSONRequest 中回调
        } catch (JSONException e) {
            e.printStackTrace();
        }
    }
}

HttpUtil.java

import java.io.ByteArrayOutputStream;
import java.io.Closeable;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;

public final class HttpUtil {
    public static final int CONNECTION_TIMEOUT = 10 * 1000;

    public static String requestJson(String url, String jsonParams) throws IOException {
        InputStream is = null;
        OutputStream os = null;
        try {
            HttpURLConnection conn = (HttpURLConnection) new URL(url).openConnection();
            conn.setInstanceFollowRedirects(true);
            conn.setReadTimeout(CONNECTION_TIMEOUT);
            conn.setConnectTimeout(CONNECTION_TIMEOUT);
            conn.setRequestProperty("Content-Type", "application/json");
            conn.setDoOutput(true);
            conn.setDoInput(true);
            conn.setRequestMethod("POST");
            conn.connect();

            os = conn.getOutputStream();
            os.write(jsonParams.getBytes());
            os.close();

            int statusCode = conn.getResponseCode();
            ByteArrayOutputStream baos = new ByteArrayOutputStream();

            if (statusCode == HttpURLConnection.HTTP_OK) {
                is = conn.getInputStream();
                int cnt;
                final byte[] buf = new byte[8192];
                while ((cnt = is.read(buf, 0, buf.length)) != -1) {
                    baos.write(buf, 0, cnt);
                }
            } else {
                return null;
            }
            return baos.toString();
        } finally {
            close(is);
            close(os);
        }
    }

    public static void close(Closeable close) {
        try {
            if (close != null)
                close.close();
        } catch (Exception e) {

        }
    }
}

技术点
AsyncTask & 设置回调等