仿微博分享页面
这几天公司项目需要有分享功能，于是自己就模仿了新浪微博客户端做了一下，简单的做了四个分享。
没图你说个杰宝~~~上截图~~
这里主要用到的是PopWindow。
下面看撸主的代码~~
ShareMenu.java
public class ShareMenu{
private Context context;
private View view;
private TextView txtCancel;
private GridView gridView;
private PopupWindow popupWindow;
private String[] shareNames;
private String[] sharePackageNames;
private String[] shareActicityNames;
private int[] shareIcons;
private File appDir;
public ShareMenu(Context context){
this.context = context;
shareNames = new String[]{"微博","朋友圈","微信好友","QQ空间"};
sharePackageNames = new String[]{ "com.sina.weibo",
"com.tencent.mm",
"com.tencent.mm",
"com.qzone"};
shareActicityNames = new String[]{ "com.sina.weibo.ComposerDispatchActivity",
"com.tencent.mm.ui.tools.ShareToTimeLineUI",
"com.tencent.mm.ui.tools.ShareImgUI",
"com.qzone.ui.operation.QZonePublishMoodActivity"};
shareIcons = new int[]{ R.drawable.more_weibo,
R.drawable.more_circlefriends,
R.drawable.more_weixin,
R.drawable.more_qzone};
//创建应用的目录
appDir = FileUtil.createDir("ShareMenu",Environment.getExternalStorageDirectory().getAbsolutePath());
initView();
}
/**
* 初始化控件
*/
private void initView(){
view = LayoutInflater.from(context).inflate(R.layout.layout_share_menu, null);
gridView = (GridView) view.findViewById(R.id.layout_share_menu_grid);
txtCancel = (TextView) view.findViewById(R.id.layout_share_menu_txt_cancel);
gridView.setAdapter(new ShareAdapter(context, shareIcons, shareNames));
popupWindow = new PopupWindow(view, LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
// 这个是为了点击“返回/Back”也能使其消失，并且并不会影响你的背景
ColorDrawable dw = new ColorDrawable(Color.WHITE);
popupWindow.setBackgroundDrawable(dw);
//网格的单击事件
gridView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View view, int position,
long arg3) {
// 判断是否安装了该应用程序
if (isExistApp(sharePackageNames[position])) {
Intent shareIntent = new Intent(Intent.ACTION_SEND);
shareIntent.setComponent(new ComponentName(sharePackageNames[position],
shareActicityNames[position]));
//设置类型
shareIntent.setType("image/*");
File file = shotScreen(context);
shareIntent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(file));
shareIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(shareIntent);
}else {
Toast.makeText(context, "未安装该应用", Toast.LENGTH_SHORT).show();
}
}
});
//"取消"按钮的监听事件
txtCancel.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
dismiss();
}
});
}
/**
* 截图并保存到本地
* @return
*/
public File shotScreen(Context context){
Activity activity = (Activity)context;
//获取屏幕截图，这种截图方式不能截取状态栏
View view = activity.getWindow().getDecorView();
view.setDrawingCacheEnabled(true);
view.buildDrawingCache();
Bitmap bmp = view.getDrawingCache();
//创建截图文件
File shotScreen = FileUtil.createFile("ShotScreen.png", appDir.getPath());
FileOutputStream fos = null;
try {
fos = new FileOutputStream(shotScreen);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
//将截图保存到本地，参数分别是截图的格式，图片的质量（百分比），输出流
bmp.compress(Bitmap.CompressFormat.PNG, 100, fos);
return shotScreen;
}
/**
* 检索手机是否安装了该应用程序
* @param packageName
* @return
*/
public boolean isExistApp(String packageName){
PackageManager pm = context.getPackageManager();
//0表示第三方应用，非0表示系统应用
List<PackageInfo> list = pm.getInstalledPackages(0);
for (PackageInfo packageInfo : list) {
if (packageName.equals(packageInfo.packageName)) {
return true;
}
}
return false;
}
/**
* 显示菜单
* @param parent
*/
public void show(View parent) {
//让菜单显示在屏幕的最下方
popupWindow.showAtLocation(parent,Gravity.BOTTOM|Gravity.CENTER_HORIZONTAL,0, 0);
// 使其聚集
popupWindow.setFocusable(true);
//刷新状态
popupWindow.update();
}
/**
* 隐藏菜单
*/
public void dismiss() {
popupWindow.dismiss();
}
}
要分享到特定的应用就要先知道那个应用的包名和分享页面的activity名。那怎么知道这些信息呢。
可以用PackageManager
List<ResolveInfo> mApps = new ArrayList<ResolveInfo>();
Intent intent = new Intent(Intent.ACTION_SEND, null);
intent.addCategory(Intent.CATEGORY_DEFAULT);
intent.setType("text/plain");
PackageManager pManager = context.getPackageManager();
mApps = pManager.queryIntentActivities(intent,
PackageManager.COMPONENT_ENABLED_STATE_DEFAULT);
//遍历可以分享的应用，打印出它们的包名和分享页面的activity名
//还可以读取出他们的图标和其他信息，撸主这里就不一一列出了
for (ResolveInfo resolveInfo : mApps) {
System.out.println("AppPackageName: " + resolveInfo.activityInfo.packageName );
System.out.println("ShareActivityName: " + resolveInfo.activityInfo.name );
}
ShareAdapter.java
public class ShareAdapter extends BaseAdapter{
private String[] shareNames;
private int[] appIcons;
private Context context;
public ShareAdapter(Context context , int[] appIcons,String[] shareNames){
this.appIcons = appIcons;
this.shareNames = shareNames;
this.context = context;
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return shareNames.length;
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return null;
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
Holder holder = null;
if (convertView == null) {
convertView = LayoutInflater.from(context).inflate(R.layout.layout_menu_item, parent, false);
holder = new Holder();
holder.imgAppIcon = (ImageView) convertView.findViewById(R.id.share_app_icon);
holder.txtAppShareName = (TextView) convertView.findViewById(R.id.share_app_name);
convertView.setTag(holder);
}else {
holder = (Holder) convertView.getTag();
}
holder.imgAppIcon.setImageResource(appIcons[position]);
holder.txtAppShareName.setText(shareNames[position]);
return convertView;
}
final class Holder{
public ImageView imgAppIcon;
public TextView txtAppShareName;
}
}
最后在Activity中，重写按键事件就可以啦
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
menu = new ShareMenu(this);
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
// TODO Auto-generated method stub
if (KeyEvent.KEYCODE_MENU == keyCode) {
menu.show(new View(this));
}
return super.onKeyDown(keyCode, event);
}
private ShareMenu menu;
}
最后的最后，别忘了添加SD卡写入权限
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />