Android模仿新浪微博（写微博界面）

发布一条新微博接口：http://open.weibo.com/wiki/2/statuses/update
上传图片并发布一条新微博接口：http://open.weibo.com/wiki/2/statuses/upload

1.根据有没有图片来选择相应的接口。
2.根据输入框的改变判断文字数。
3.创建一个girlview显示发送的图片，最最多9张，此处由于请求参数的的原因，最多上传一张图片，选择多张图片时，上传最后一张图片。（已解决：http://blog.csdn.net/demonliuhui/article/details/53256543）
4.显示表情的实现：用正则表达式遍历文字内容，代获取与表情相符的内容后，用SpannableString将对于的表情图片显示在TextView中。
5.表情面板的实现：创建显示表情的GridView，将表情分组放入其中，监听GridView点击事件，将表情显示输入到EditText中。具体表情功能的实现请参考：http://www.eoeandroid.com/thread-897807-1-1.html?_dsign=cbb4daa9
5.最终发送的文字，表情，图片数量，根据按钮触发时各个参数的状态而决定。
6.删除选中的图片，获取其位置使用imageItem.remove(position)再将其在ArrayList移除。

public class WriteActivity extends Activity implements AdapterView.OnItemClickListener {private Button onput, addexpression;private EditText write;private GridView gridView;private TextView total_text_num = null;private LinearLayout ll_emotion_dashboard;private ViewPager vp_emotion_dashboard;// 发送图片的路径private String image_path;private Bitmap bmp;private ArrayList<String> imagepaths;private ArrayList<HashMap<String, Object>> imageItem;private SimpleAdapter simpleAdapter;     //适配器private Tools tools;private EmotionPagerAdapter emotionPagerGvAdapter;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.write);imagepaths = new ArrayList<>();write = (EditText) findViewById(R.id.write);total_text_num = (TextView) findViewById(R.id.total_text_num);onput = (Button) findViewById(R.id.onput);addexpression = (Button) findViewById(R.id.addexpression);ll_emotion_dashboard = (LinearLayout) findViewById(R.id.ll_emotion_dashboard);vp_emotion_dashboard = (ViewPager) findViewById(R.id.vp_emotion_dashboard);/***   注册输入框内容监听器*/write.addTextChangedListener(new TextWatcher() {@Overridepublic void beforeTextChanged(CharSequence s, int start, int count, int after) {}/*** 当输入框的内容变化的时候执行*/@Overridepublic void onTextChanged(CharSequence s, int start, int before, int count) {boolean flag = false;String mText = write.getText().toString();int len = mText.length();if (len > 140) {total_text_num.setTextColor(Color.RED);} else {total_text_num.setTextColor(Color.GREEN);}total_text_num.setText(String.valueOf(140 - len));}@Overridepublic void afterTextChanged(Editable s) {}});gridView = (GridView) findViewById(R.id.images);bmp = BitmapFactory.decodeResource(getResources(), R.drawable.add);imageItem = new ArrayList<HashMap<String, Object>>();HashMap<String, Object> map = new HashMap<String, Object>();map.put("itemImage", bmp);imageItem.add(map);simpleAdapter = new SimpleAdapter(this,imageItem, R.layout.griditem_addpic,new String[]{"itemImage"}, new int[]{R.id.imageView});simpleAdapter.setViewBinder(new SimpleAdapter.ViewBinder() {@Overridepublic boolean setViewValue(View view, Object data,String textRepresentation) {if (view instanceof ImageView && data instanceof Bitmap) {ImageView i = (ImageView) view;i.setImageBitmap((Bitmap) data);return true;}return false;}});gridView.setAdapter(simpleAdapter);/*** 监听GridView点击事件*/gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {@Overridepublic void onItemClick(AdapterView<?> parent, View v, int position, long id) {if (imageItem.size() == 10) { //第一张为默认图片Toast.makeText(WriteActivity.this, "图片数9张已满", Toast.LENGTH_SHORT).show();} else if (position == 0) { //点击图片位置为+ 0对应0张图片//选择图片Intent intent = new Intent(Intent.ACTION_PICK,android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);startActivityForResult(intent, 1);//通过onResume()刷新数据} else {dialog(position);}}});/*** 监听发表按钮点击事件*/tools = Tools.getInstance();onput.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {//对文字进行处理String mText = write.getText().toString();int len = mText.length();if (len == 0) {Toast.makeText(WriteActivity.this, "内容不能为空！", Toast.LENGTH_SHORT).show();} else if (len > 140) {Toast.makeText(WriteActivity.this, "超出字数限制！", Toast.LENGTH_SHORT).show();} else {if (imagepaths.size() > 0) {tools.postwhitTextandImages(WriteActivity.this, mText,imagepaths);//进入微博主界面Intent intent = new Intent(WriteActivity.this, MainActivity.class);startActivity(intent);WriteActivity.this.finish();} else {tools.postwhitText(WriteActivity.this, mText);//进入微博主界面Intent intent = new Intent(WriteActivity.this, MainActivity.class);startActivity(intent);WriteActivity.this.finish();}}}});/*** 表情按钮及功能*/addexpression.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {// 隐藏或显示表情面板ll_emotion_dashboard.setVisibility(ll_emotion_dashboard.getVisibility() == View.VISIBLE ?View.GONE : View.VISIBLE);}});initEmotion();}//获取图片路径 响应startActivityForResultprotected void onActivityResult(int requestCode, int resultCode, Intent data) {super.onActivityResult(requestCode, resultCode, data);//打开图片if (resultCode == RESULT_OK && requestCode == 1) {Uri uri = data.getData();if (!TextUtils.isEmpty(uri.getAuthority())) {//查询选择图片Cursor cursor = getContentResolver().query(uri,new String[]{MediaStore.Images.Media.DATA},null,null,null);//返回 没找到选择图片if (null == cursor) {return;}//光标移动至开头 获取图片路径cursor.moveToFirst();image_path = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA));}}  //end if 打开图片}//刷新图片@Overrideprotected void onResume() {super.onResume();if (!TextUtils.isEmpty(image_path)) {Bitmap addbmp = BitmapFactory.decodeFile(image_path);HashMap<String, Object> map = new HashMap<String, Object>();map.put("itemImage", addbmp);imageItem.add(map);simpleAdapter = new SimpleAdapter(this,imageItem, R.layout.griditem_addpic,new String[]{"itemImage"}, new int[]{R.id.imageView});simpleAdapter.setViewBinder(new SimpleAdapter.ViewBinder() {@Overridepublic boolean setViewValue(View view, Object data,String textRepresentation) {if (view instanceof ImageView && data instanceof Bitmap) {ImageView i = (ImageView) view;i.setImageBitmap((Bitmap) data);return true;}return false;}});gridView.setAdapter(simpleAdapter);simpleAdapter.notifyDataSetChanged();imagepaths.add(image_path);//刷新后释放防止手机休眠后自动添加image_path = null;}}/*** Dialog对话框提示用户删除操作* position为删除图片位置*/protected void dialog(final int position) {AlertDialog.Builder builder = new AlertDialog.Builder(WriteActivity.this);builder.setMessage("确认移除已添加图片吗？");builder.setTitle("提示");builder.setPositiveButton("确认", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {dialog.dismiss();imageItem.remove(position);imagepaths.remove(position - 1);simpleAdapter.notifyDataSetChanged();}});builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {dialog.dismiss();}});builder.create().show();}/***  初始化表情面板内容*/private void initEmotion() {// 获取屏幕宽度int gvWidth = DisplayUtils.getScreenWidthPixels(this);// 表情边距int spacing = DisplayUtils.dp2px(this, 8);// GridView中item的宽度int itemWidth = (gvWidth - spacing * 8) / 7;int gvHeight = itemWidth * 3 + spacing * 4;List<GridView> gvs = new ArrayList<GridView>();List<String> emotionNames = new ArrayList<String>();// 遍历所有的表情名字for (String emojiName : EmotionUtils.emojiMap.keySet()) {emotionNames.add(emojiName);// 每20个表情作为一组,同时添加到ViewPager对应的view集合中if (emotionNames.size() == 20) {GridView gv = createEmotionGridView(emotionNames, gvWidth, spacing, itemWidth, gvHeight);gvs.add(gv);// 添加完一组表情,重新创建一个表情名字集合emotionNames = new ArrayList<String>();}}// 检查最后是否有不足20个表情的剩余情况if (emotionNames.size() > 0) {GridView gv = createEmotionGridView(emotionNames, gvWidth, spacing, itemWidth, gvHeight);gvs.add(gv);}// 将多个GridView添加显示到ViewPager中emotionPagerGvAdapter = new EmotionPagerAdapter(gvs);vp_emotion_dashboard.setAdapter(emotionPagerGvAdapter);LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(gvWidth, gvHeight);vp_emotion_dashboard.setLayoutParams(params);}/*** 创建显示表情的GridView*/private GridView createEmotionGridView(List<String> emotionNames, int gvWidth, int padding, int itemWidth, int gvHeight) {// 创建GridViewGridView gv = new GridView(this);gv.setBackgroundColor(Color.rgb(233, 233, 233));gv.setSelector(android.R.color.transparent);gv.setNumColumns(7);gv.setPadding(padding, padding, padding, padding);gv.setHorizontalSpacing(padding);gv.setVerticalSpacing(padding);LayoutParams params = new LayoutParams(gvWidth, gvHeight);gv.setLayoutParams(params);// 给GridView设置表情图片EmotionGvAdapter adapter = new EmotionGvAdapter(this, emotionNames, itemWidth);gv.setAdapter(adapter);gv.setOnItemClickListener(this);return gv;}@Overridepublic void onItemClick(AdapterView<?> parent, View view, int position, long id) {Object itemAdapter = parent.getAdapter();if (itemAdapter instanceof EmotionGvAdapter) {// 点击的是表情EmotionGvAdapter emotionGvAdapter = (EmotionGvAdapter) itemAdapter;if (position == emotionGvAdapter.getCount() - 1) {// 如果点击了最后一个回退按钮,则调用删除键事件write.dispatchKeyEvent(new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_DEL));} else {// 如果点击了表情,则添加到输入框中String emotionName = emotionGvAdapter.getItem(position);// 获取当前光标位置,在指定位置上添加表情图片文本int curPosition = write.getSelectionStart();StringBuilder sb = new StringBuilder(write.getText().toString());sb.insert(curPosition, emotionName);// 特殊文字处理,将表情等转换一下write.setText(StringUtils.getEmotionContent(this, write, sb.toString()));// 将光标设置到新增完表情的右侧write.setSelection(curPosition + emotionName.length());}}}
}

发布微博的方法位于Tools.java中。由于上传的数据采用multipart/form-data编码方式，此处引入第三方httptmime.jar包对请求参数进行处理。

 /*** 发布一条不含图片的微博** @param context* @param text*/public void postwhitText(final Context context, final String text) {if (oAuth == null) {oAuth = oAuth.getOAuth(context);}new Thread() {@Overridepublic void run() {try {HttpPost post = new HttpPost("https://api.weibo.com/2/statuses/update" +".json");List<NameValuePair> params = new ArrayList<NameValuePair>();params.add(new BasicNameValuePair("access_token", oAuth.getAccessToken()));params.add(new BasicNameValuePair("status", text));post.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));HttpResponse response = httpClient.execute(post);if (response.getStatusLine().getStatusCode() == 200) {Looper.prepare();Toast.makeText(context, "发表成功", Toast.LENGTH_SHORT).show();Looper.loop();} else {Looper.prepare();Toast.makeText(context, "发表失败", Toast.LENGTH_SHORT).show();Looper.loop();}} catch (UnsupportedEncodingException e) {e.printStackTrace();} catch (ClientProtocolException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}}}.start();}/*** 发布一条带图片的微博** @param context* @param*/public void postwhitTextandImages(final Context context, final String text, final List<String> filesPath) {new Thread() {@Overridepublic void run() {try {//HttpClient对象HttpClient httpClient = new DefaultHttpClient();//采用POST的请求方式HttpPost httpPost = new HttpPost("https://upload.api.weibo" +".com/2/statuses/upload.json");//MultipartEntity对象，需要httpmime-4.1.1.jar文件。MultipartEntity multipartEntity = new MultipartEntity();//StringBody对象，参数StringBody param = new StringBody(oAuth.getAccessToken());multipartEntity.addPart("access_token", param);StringBody param1 = new StringBody(URLEncoder.encode(text));multipartEntity.addPart("status", param1);//filesPath为List<String>对象，里面存放的是需要上传的文件的地址for (String path : filesPath) {Log.i("------------", path);//FileBody对象，需要上传的文件ContentBody file = new FileBody(new File(path));multipartEntity.addPart("pic", file);}//将MultipartEntity对象赋值给HttpPosthttpPost.setEntity(multipartEntity);HttpResponse response = null;//执行请求，并返回结果HttpResponseresponse = httpClient.execute(httpPost);if (response.getStatusLine().getStatusCode() == 200) {Looper.prepare();Toast.makeText(context, "发表成功", Toast.LENGTH_SHORT).show();Looper.loop();} else {Looper.prepare();Toast.makeText(context, "发表失败", Toast.LENGTH_SHORT).show();Looper.loop();}} catch (ClientProtocolException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}}}.start();}

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Android模仿新浪微博（写微博界面）

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