简单实现一个Launcher

简单实现一个Launcher

1.javabean

public class AppNameIcon {

public StringappName;//应用名

    public DrawableappIcon;//应用图标

    public StringappClass;//类名

    public StringappPackage;//包名

    public IntentintentPackage;

    /*public AppNameIcon( Drawable appIcon,String appName) {

this.appName = appName;

this.appIcon = appIcon;

}*/

    public AppNameIcon(String appName, Drawable appIcon, String appClass, String appPackage,Intent intentPackage) {

this.appName = appName;

        this.appIcon = appIcon;

        this.appClass = appClass;

        this.appPackage = appPackage;

        this.intentPackage = intentPackage;

    }

public IntentgetIntentPackage() {

return intentPackage;

    }

public void setIntentPackage(Intent intentPackage) {

this.intentPackage = intentPackage;

    }

public StringgetAppClass() {

return appClass;

    }

public void setAppClass(String appClass) {

this.appClass = appClass;

    }

public StringgetAppPackage() {

return appPackage;

    }

public void setAppPackage(String appPackage) {

this.appPackage = appPackage;

    }

public StringgetAppName() {

return appName;

    }

public void setAppName(String appName) {

this.appName = appName;

    }

public DrawablegetAppIcon() {

return appIcon;

    }

public void setAppIcon(Drawable appIcon) {

this.appIcon = appIcon;

    }

}

2.获取桌面应用

public class AppNameAndIcon {

private ListmAppNameIconList;

    private AppNameIconmAppNameIcon;

    private PackageManagermPackageManager;

    public ListgetAppInfos(Context context) {

mPackageManager = context.getPackageManager();

        List packgeInfos =mPackageManager.getInstalledPackages(PackageManager.GET_UNINSTALLED_PACKAGES);

        mAppNameIconList =new ArrayList<>();

        //调用固定的数据

        /*DataDesktop desktop =new DataDesktop();

        List myAppNameIconList =  desktop.appInfos();

        for(int i =0; i < myAppNameIconList.size(); i++){

mAppNameIconList.add(myAppNameIconList.get(i));

        }*/

for (PackageInfo packgeInfo : packgeInfos) {

//去除系统应用

            ApplicationInfo appInfo = packgeInfo.applicationInfo;

            if (!filterApp(appInfo)) {

continue;

            }

String packageName = packgeInfo.packageName;

            String className = packgeInfo.applicationInfo.className;

            String appName = packgeInfo.applicationInfo.loadLabel(mPackageManager).toString();

            Drawable drawable = packgeInfo.applicationInfo.loadIcon(mPackageManager);

            Intent intent =mPackageManager.getLaunchIntentForPackage(packageName);

            mAppNameIcon =new AppNameIcon(appName,drawable,className,packageName,intent);

            mAppNameIconList.add(mAppNameIcon);

        }

return mAppNameIconList;

    }

    //判断某一个应用程序是不是系统的应用程序，

    //如果是返回true，否则返回false。

    public boolean filterApp(ApplicationInfo info) {

//有些系统应用是可以更新的，如果用户自己下载了一个系统的应用来更新了原来的，它还是系统应用，这个就是判断这种情况的

        if ((info.flags & ApplicationInfo.FLAG_UPDATED_SYSTEM_APP) !=0) {

return true;

            //判断是不是系统应用

        }else if ((info.flags & ApplicationInfo.FLAG_SYSTEM) ==0) {

return true;

        }

return false;

    }

}

3.Adapter

public class AppNameIconAdapterextends RecyclerView.Adapter {

private Viewview;

    private ListmAppNameIconList;

    private AppNameIconmAppNameIcon;

    private ContextmContext;

    public ListgetmAppNameIconList() {

return mAppNameIconList;

    }

public void setmAppNameIconList(List mAppNameIconList) {

this.mAppNameIconList = mAppNameIconList;

    }

private LayoutInflatermInflater;

    private OnItemClickListenermOnItemClickListener;

    public AppNameIconAdapter(List appNameIconList,Context context) {

this.mAppNameIconList = appNameIconList;

        mAppNameIconList= fixListOrder(mAppNameIconList);

        this.mContext = context;

        mInflater = LayoutInflater.from(context);

    }

/**

    * 固定制定app的位置

    * @param mAppNameIconList

    * @return

    */

    private ListfixListOrder(List mAppNameIconList) {

List list=new ArrayList();

        for(int i=0;i

AppNameIcon appNameIcon=mAppNameIconList.get(i);

            switch (appNameIcon.getAppPackage()){

case "com.topwise.etone.demo":

list.add(appNameIcon);

                    mAppNameIconList.remove(appNameIcon);

break;

                default:

i++;

break;

            }

}

list.addAll(mAppNameIconList);

        return  list;

    }

@NonNull

@Override

    public AppNameIconHolderonCreateViewHolder(@NonNull ViewGroup parent, int viewType) {

view =mInflater.inflate(R.layout.desktop_app_item, parent, false);

//        view.setOnClickListener(this);

        return new AppNameIconHolder(view,mOnItemClickListener);

    }

@Override

    public void onBindViewHolder(@NonNull AppNameIconHolder holder, int position) {

/*if(position > 5){

}else {*/

            mAppNameIcon =mAppNameIconList.get(position);

            holder.appName.setText(mAppNameIcon.getAppName());

            holder.appIcon.setImageDrawable(mAppNameIcon.getAppIcon());

            holder.itemView.setTag(position);

        //}

    }

@Override

    public int getItemCount() {

return mAppNameIconList.size();

    }

//    @Override

//    public void onClick(View v) {

//        if(mOnItemClickListener != null){

//            mOnItemClickListener.onItemClick(v, (Integer) v.getTag());

//        }

//    }

    public class AppNameIconHolderextends RecyclerView.ViewHolder{

public ImageViewappIcon;

        public TextViewappName;

        public AppNameIconHolder(View itemView, final AppNameIconAdapter.OnItemClickListener listener) {

super(itemView);

            this.appIcon = (ImageView)itemView.findViewById(R.id.movie_icon);

            this.appName = (TextView)itemView.findViewById(R.id.movie_name);

            itemView.setOnClickListener(new View.OnClickListener() {

@Override

                public void onClick(View v) {

if(listener !=null){

listener.onItemClick(v, getPosition());

                    }

}

});

        }

}

//接口回调

    public interface OnItemClickListener {

void onItemClick(View v, int position);

    }

//给接口设置set

    public void setOnItemClickListener(AppNameIconAdapter.OnItemClickListener onItemClickListener) {

this.mOnItemClickListener = onItemClickListener;

    }

}

4.Activity

4.1给activity配置默认launcher属性

<category android:name="android.intent.category.HOME" />

<category android:name="android.intent.category.DEFAULT"/>

<category android:name="android.intent.category.MONKEY" />

4.2系统activity

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

    supportRequestWindowFeature(Window.FEATURE_NO_TITLE);

    setContentView(R.layout.activity_home);

    initView();

    getAppNameIcon();

}

//

//private void setS

//获取应用

private void getAppNameIcon(){

mAppNameAndIcon =new AppNameAndIcon();

    //LayoutManage manage = new LayoutManage(this,null,3,2);

//GridView gridView = new GridView(this, 3,3);

    GridLayoutManager layoutManager =new GridLayoutManager(this, 3);

    mRecyclerView.setLayoutManager(layoutManager);

    /*layoutManager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {

@Override

public int getSpanSize(int position) {

return position == 2 ? 1 : 3;

}

});*/

//mRecyclerView.setLayoutManager(layoutManager);

    mAppNameIconAdapter =new AppNameIconAdapter(mAppNameAndIcon.getAppInfos(this),HomeActivity.this);

    mRecyclerView.setHasFixedSize(true);

    mRecyclerView.setAdapter(mAppNameIconAdapter);

    mAppNameIconAdapter.setOnItemClickListener(this);

}

//初始化

private void initView(){

mToolbar = (Toolbar) findViewById(R.id.toolbar);

    setSupportActionBar(mToolbar);

    getSupportActionBar().setTitle(null);

    mRecyclerView = (RecyclerView) findViewById(R.id.recycler_view_app);

    mTitle = (TextView) findViewById(R.id.title);

    mTitle.setText(R.string.EtonePay_app);

}

@Override

public void onItemClick(View v, int position) {

      Toast.makeText(this, "" + position, Toast.LENGTH_SHORT).show();

}