/** * 分享activity */public class NShareActivity extends AppCompatActivity {  public final static String EXTRA_STR_TO_SHARE="str_to_share1";  private class SharedPkgInfo{    String pkgName;    Drawable icon;    String appName;    String activityClassName;  }  class Vh extends RecyclerView.ViewHolder {    TextView tv;    ImageView iv;    public Vh(View itemView) {      super(itemView);      itemView.setOnClickListener(new View.OnClickListener() {        @Override        public void onClick(View view) {          //點擊了某個app的圖標，用選擇的app分享內容          Intent share = new Intent(android.content.Intent.ACTION_SEND);          share.setType("text/*");          share.putExtra(Intent.EXTRA_SUBJECT, "分享");          share.putExtra(Intent.EXTRA_TEXT,NShareActivity.this.strToShare);          //share.putExtra(Intent.EXTRA_STREAM, uri); // Optional, just if you wanna share an image.          SharedPkgInfo pi = sharePkgInfo.get(getAdapterPosition());          share.setClassName(pi.pkgName,pi.activityClassName);          //share.setPackage();          startActivity(share);        }      });    }  }  //獲取支持供享的包的信息  List<SharedPkgInfo> sharePkgInfo=new ArrayList<>();  //要分享出去的文本放在這里  private String strToShare=null;  @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    Intent intent= this.getIntent();    strToShare = intent.getStringExtra(EXTRA_STR_TO_SHARE);    getAllSharePackages();    //將可共享的app圖標都放在一個gridview中    RecyclerView v=new RecyclerView(this);    v.setPadding(16,16,16,16);    GridLayoutManager lm=new GridLayoutManager(this,4);    v.setLayoutManager(lm);    v.setAdapter(new RecyclerView.Adapter<Vh>()    {      @Override      public Vh onCreateViewHolder(ViewGroup parent, int viewType) {        //必須創建新的view holder        LinearLayout v=new LinearLayout(NShareActivity.this);        v.setPadding(8,8,8,8);        Vh vh=new Vh(v);        //先創建item view:上面一個圖標，下面一個文本        LinearLayout.LayoutParams lp=new LinearLayout.LayoutParams(            LinearLayout.LayoutParams.MATCH_PARENT,            LinearLayout.LayoutParams.WRAP_CONTENT);        v.setOrientation(LinearLayout.VERTICAL);        v.setLayoutParams(lp);        ImageView imgv=new ImageView(NShareActivity.this);        imgv.setLayoutParams(new LinearLayout.LayoutParams(            LinearLayout.LayoutParams.MATCH_PARENT,            120));        TextView tv=new TextView(NShareActivity.this);        tv.setGravity(Gravity.CENTER);        v.addView(imgv);        v.addView(tv);        vh.tv=tv;        vh.iv=imgv;        return vh;      }      @Override      public void onBindViewHolder(Vh holder, int position) {        //將視圖與數據綁定        SharedPkgInfo spi=sharePkgInfo.get(position);        holder.tv.setText(spi.appName);        holder.iv.setImageDrawable(spi.icon);      }      @Override      public int getItemCount() {        return sharePkgInfo.size();      }    });    v.setBackgroundColor(Color.WHITE);    this.setContentView(v);  }  //獲取所有支持send Action的包名和圖片  void getAllSharePackages()  {    Intent share = new Intent(android.content.Intent.ACTION_SEND);    //分析網站地址的話用這個：    //intent.setType("text/plain"); //純文本    share.setType("text/*");    // gets the list of intents that can be loaded.    List<ResolveInfo> resInfo = getPackageManager().queryIntentActivities(share, 0);    if (!resInfo.isEmpty()) {      for (ResolveInfo info : resInfo) {        SharedPkgInfo spi = new SharedPkgInfo();        spi.pkgName = info.activityInfo.packageName;        spi.icon = info.loadIcon(getPackageManager());        spi.appName = info.loadLabel(getPackageManager()).toString();        spi.activityClassName=info.activityInfo.name;        sharePkgInfo.add(spi);        //Log.w("shared",spi.pkgName+" , "+spi.appName+","+info.activityInfo.name);      }    }  }}