Android 自定义应用抽屉Launcher

可以根据应用名称和安装时间进行排序，效果图：

核心代码：

package com.zms.launcher;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import android.app.Activity;import android.app.AlertDialog;import android.content.ActivityNotFoundException;import android.content.BroadcastReceiver;import android.content.Context;import android.content.DialogInterface;import android.content.Intent;import android.content.IntentFilter;import android.content.pm.PackageManager;import android.content.pm.PackageManager.NameNotFoundException;import android.content.pm.ResolveInfo;import android.graphics.Bitmap;import android.graphics.Canvas;import android.graphics.PixelFormat;import android.graphics.drawable.Drawable;import android.net.Uri;import android.os.Bundle;import android.util.Log;import android.view.ContextMenu;import android.view.ContextMenu.ContextMenuInfo;import android.view.KeyEvent;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.widget.AdapterView;import android.widget.AdapterView.AdapterContextMenuInfo;import android.widget.AdapterView.OnItemClickListener;import android.widget.EditText;import android.widget.GridView;import android.widget.Toast;public class Main extends Activity {    static DbOperation db = null;    static List<App> appInfo = null;    PackageManager packageManager = null;    int orderFlag = 0; // 排序方式标志,0-默认排序，1-名字排序，2-时间排序    static boolean isEqual = false;    List<ResolveInfo> apps = null;    List<ResolveInfo> apps2 = null;    private static final String TAG = "ScrollLayoutTest";    private ScrollLayout mScrollLayout;    private static final float APP_PAGE_SIZE = 36.0f;    private Context mContext;    int upCount;    @Override    protected void onCreate(Bundle savedInstanceState) {        // TODO Auto-generated method stub        super.onCreate(savedInstanceState);        mContext = this;        setContentView(R.layout.main);        mScrollLayout = (ScrollLayout) findViewById(R.id.ScrollLayoutTest);        initViews();    }    @Override    public boolean onCreateOptionsMenu(Menu menu) {        // TODO Auto-generated method stub        menu.add(0, 1, 1, "● 默认排序[当前]");        menu.add(0, 2, 1, "○ 名称排序");        menu.add(0, 3, 1, "○ 时间排序");        menu.add(0, 4, 1, "   关于应用");        menu.add(0, 5, 1, "   更新桌面");        return super.onCreateOptionsMenu(menu);    }    @Override    public boolean onOptionsItemSelected(MenuItem item) {        switch (item.getItemId()) {            case 1: // 默认排序[当前]                break;            case 2: // 名称排序                Intent intent1 = new Intent(this, DeskByName.class);                startActivity(intent1);                break;            case 3: // 按安装时间排序                Intent intent2 = new Intent(this, DeskByTime.class);                startActivity(intent2);                break;            case 4:// 关于                Intent intent3 = new Intent(this, About.class);                startActivity(intent3);                break;            case 5:// 更新桌面                onCreate(null);                break;            default:        }        return super.onOptionsItemSelected(item);    }    public void initViews() {        packageManager = getPackageManager();        final Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);        mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);        List<HashMap<String, Object>> items = new ArrayList<HashMap<String, Object>>();        // get all apps        apps = packageManager.queryIntentActivities(mainIntent, 0);        for (ResolveInfo pi : apps) {            HashMap<String, Object> map = new HashMap<String, Object>();            PackageManager manager = this.getPackageManager();            map.put("appIcon", pi.loadIcon(packageManager));            map.put("appName", pi.loadLabel(packageManager).toString());            map.put("appPack", pi.activityInfo.packageName);            try {                map.put("appTime", Long.toString(manager.getPackageInfo(                        pi.activityInfo.packageName, 0).firstInstallTime));            } catch (NameNotFoundException e) {                e.printStackTrace();            }            items.add(map);        }        // ToDB        db = new DbOperation(this);        long countlong = db.getCount(); // 获取数据库中记录数目        int countint = (int) countlong;        upCount = items.size();// +++++++++++++++++++++++++++++++++++++++upCount        if (countint == items.size()) {            isEqual = true;            // 若记录数目与当前items.size()相等，则不插入应用信息，只插入时间            for (int m = 0; m < items.size(); m++) {                // 插入时间：                String appPack2 = (String) items.get(m).get("appPack");                try {                    PackageManager manager = this.getPackageManager();                    String appTime2 = Long.toString(manager.getPackageInfo(                            appPack2, 0).firstInstallTime);                    db.insertTime(appTime2, appPack2);                } catch (NameNotFoundException e) {                    // TODO Auto-generated catch block                    e.printStackTrace();                }            }        } else {            // 若不等，则先清空表数据，然后再插入应用信息，然后插入时间            db.deleteTable();            for (int i = 0; i < items.size(); i++) {                String appName = (String) items.get(i).get("appName");                String appPack = (String) items.get(i).get("appPack");                String appTime = (String) items.get(i).get("Time");                App appInfo = new App(appName, appPack, appTime);                DbOperation db = new DbOperation(this);                db.insertApp(appInfo);                // 插入时间：                String appPack2 = (String) items.get(i).get("appPack");                try {                    PackageManager manager = this.getPackageManager();                    String appTime2 = Long.toString(manager.getPackageInfo(                            appPack2, 0).firstInstallTime);                    db.insertTime(appTime2, appPack2);                } catch (NameNotFoundException e) {                    // TODO Auto-generated catch block                    e.printStackTrace();                }            }        }        // 读取数据库信息        db = new DbOperation(this);        if (orderFlag == 0) {            appInfo = db.query("appTable");        } else if (orderFlag == 1) {            appInfo = db.queryByName("appTable");        } else if (orderFlag == 2) {            appInfo = db.queryByTime("appTable");        }        final int PageCount = (int) Math.ceil(apps.size() / APP_PAGE_SIZE);        Log.e(TAG, "size:" + apps.size() + " page:" + PageCount);        for (int i = 0; i < PageCount; i++) {            GridView appPage = new GridView(this);            this.registerForContextMenu(appPage);            appPage.setAdapter(new AppAdapter(this, appInfo, i, apps, items));            appPage.setNumColumns(6);            appPage.setOnItemClickListener(listener);            mScrollLayout.addView(appPage);        }    }    public OnItemClickListener listener = new OnItemClickListener() {        public void onItemClick(AdapterView<?> parent, View view, int position,                                long id) {            GridView listView = (GridView) parent;            App appInfo = (App) (listView.getItemAtPosition(position));            String packName = appInfo.getPack();            Intent mainIntent = mContext.getPackageManager()                    .getLaunchIntentForPackage(packName);            mainIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);            try {                mContext.startActivity(mainIntent);            } catch (ActivityNotFoundException noFound) {                Toast.makeText(mContext, "未发现该应用!", Toast.LENGTH_SHORT).show();            }        }    };    public void onCreateContextMenu(ContextMenu menu, View v,                                    ContextMenuInfo menuInfo) {        menu.setHeaderTitle("操作");        menu.add(0, 1, Menu.NONE, "更名");        menu.add(0, 2, Menu.NONE, "卸载");    }    public boolean onContextItemSelected(MenuItem item) {        // 得到当前被选中的item信息        AdapterContextMenuInfo menuInfo = (AdapterContextMenuInfo) item                .getMenuInfo();        final int a = menuInfo.position;        switch (item.getItemId()) {            case 1:                final EditText e = new EditText(this);                new AlertDialog.Builder(this).setTitle("更名")                        // .setIcon(R.drawable.logo2)                        .setView(e)                        .setPositiveButton("确定",                                new DialogInterface.OnClickListener() {                                    @Override                                    public void onClick(DialogInterface dialog,                                                        int i) {                                        int b1 = mScrollLayout.getCurScreen();                                        int num1 = b1 * 36 + a;                                        String appName = appInfo.get(num1)                                                .getName();                                        System.out.println(appName);                                        String str = e.getText().toString();                                        System.out.println(str);                                        db.changeName(str, appName);                                        // 更新界面                                        onCreate(null);                                    }                                }).setNegativeButton("取消", null).show();                break;            case 2:                int b1 = mScrollLayout.getCurScreen();                int num1 = b1 * 36 + a;                String appPack = appInfo.get(num1).getPack();                Uri uri = Uri.parse("package:" + appPack);                System.out.println(appPack);                Intent intent = new Intent(Intent.ACTION_DELETE, uri);                intent.setData(uri);// 设置获取到的URI                db.deleteApp(appPack);                startActivity(intent);                // break;            default:                // 更新+延时                try {                    Thread.currentThread().sleep(300);                    onCreate(null);                } catch (InterruptedException e22) {                    e22.printStackTrace();                }                onCreate(null);                return super.onContextItemSelected(item);        }        return true;    }    @Override    public boolean onKeyDown(int keyCode, KeyEvent event) {        // TODO Auto-generated method stub        if (keyCode == KeyEvent.KEYCODE_BACK) {            finish();            return true;        }        return super.onKeyDown(keyCode, event);    }    class AppIntentReceiver extends BroadcastReceiver {        @Override        public void onReceive(Context context, Intent intent) {            onCreate(null);        }    }    private void registerIntentReceivers() {        IntentFilter filter = new IntentFilter(Intent.ACTION_PACKAGE_ADDED);        filter.addAction(Intent.ACTION_PACKAGE_REMOVED);        filter.addAction(Intent.ACTION_PACKAGE_CHANGED);        filter.addDataScheme("package");        registerReceiver(new AppIntentReceiver(), filter);    }    public static Bitmap drawableToBitmap(Drawable drawable) {        // 取 drawable 的长宽        int w = drawable.getIntrinsicWidth();        int h = drawable.getIntrinsicHeight();        // 取 drawable 的颜色格式        Bitmap.Config config = drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888                : Bitmap.Config.RGB_565;        // 建立对应 bitmap        Bitmap bitmap = Bitmap.createBitmap(w, h, config);        // 建立对应 bitmap 的画布        Canvas canvas = new Canvas(bitmap);        drawable.setBounds(0, 0, w, h);        // 把 drawable 内容画到画布中        drawable.draw(canvas);        return bitmap;    }    @Override    protected void onDestroy() {        // TODO Auto-generated method stub        android.os.Process.killProcess(android.os.Process.myPid());        super.onDestroy();        // this.finish();    }}

转载请注明出处：周木水的CSDN博客 http://blog.csdn.net/zhoumushui