Android聊天软件开发（基于网易云IM即时通讯）——发送图片消息（五）

最近工作太忙，都没有时间写博客了。废话不多说，直接上代码。

在activity_send_message.xml添加发送图片的按钮

 

在SendMessageActivity添加按钮的注册以及点击事件

package heath.com.chat.message;

import android.app.Activity;
import android.content.ComponentName;
import android.content.Intent;
import android.content.ServiceConnection;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.os.IBinder;
import android.provider.MediaStore;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;

import com.netease.nimlib.sdk.NIMClient;
import com.netease.nimlib.sdk.RequestCallback;
import com.netease.nimlib.sdk.msg.MessageBuilder;
import com.netease.nimlib.sdk.msg.MsgService;
import com.netease.nimlib.sdk.msg.constant.SessionTypeEnum;
import com.netease.nimlib.sdk.msg.model.IMMessage;

import java.io.File;
import java.net.URI;
import java.util.HashMap;

import heath.com.chat.R;
import heath.com.chat.service.IMService;
import heath.com.chat.utils.Common;
import heath.com.chat.utils.RealPathFromUriUtils;
import heath.com.chat.utils.ToastUtil;

public class SendMessageActivity extends AppCompatActivity implements View.OnClickListener {

    private static IMService mImService;
    private LinearLayout mLlReturn;
    private EditText mEdSendText;
    //调用系统相册-选择图片
    private static final int IMAGE = 1;
    /**
     * 发消息
     */
    private Button mBtnSendText;
    private static TextView mTvReceiveMessage;
    private Button mBtnAlbum;
    private static ImageView mIvReceiveMessage;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_send_message);
        initView();
        init();
    }

    private void init() {
        // 绑定服务
        Intent service = new Intent(SendMessageActivity.this, IMService.class);
        bindService(service, mMyServiceConnection, BIND_AUTO_CREATE);
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        // 解绑服务
        if (mMyServiceConnection != null) {
            unbindService(mMyServiceConnection);
        }
    }

    MyServiceConnection mMyServiceConnection = new MyServiceConnection();

    private void initView() {
        mLlReturn = (LinearLayout) findViewById(R.id.ll_return);
        mEdSendText = (EditText) findViewById(R.id.ed_send_text);
        mBtnSendText = (Button) findViewById(R.id.btn_send_text);
        mBtnSendText.setOnClickListener(this);
        mTvReceiveMessage = (TextView) findViewById(R.id.tv_receive_message);
        mBtnAlbum = (Button) findViewById(R.id.btn_album);
        mIvReceiveMessage = (ImageView) findViewById(R.id.iv_receive_message);
        mBtnAlbum.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            default:
                break;
            case R.id.ll_return:
                finish();
                break;
            case R.id.btn_album:
                Intent intent = new Intent(Intent.ACTION_PICK,
                        MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
                intent.setType("image/*");
                startActivityForResult(intent, IMAGE);
                break;
            case R.id.btn_send_text:
                final String content = mEdSendText.getText().toString();//消息文本
                String account = "1";//目前这里是写死的账号
                SessionTypeEnum type = SessionTypeEnum.P2P;//会话类型
                final IMMessage textMessage = MessageBuilder.createTextMessage(account, type, content);
                NIMClient.getService(MsgService.class).sendMessage(textMessage, false).setCallback(new RequestCallback() {
                    @Override
                    public void onSuccess(Void param) {
                        ToastUtil.toastOnUiThread(SendMessageActivity.this, "发送成功");
                    }

                    @Override
                    public void onFailed(int code) {
                        Log.e("文本发送失败", "onEvent: " + code);
                    }

                    @Override
                    public void onException(Throwable exception) {
                        Log.e("文本发送异常", "onEvent: " + exception);
                    }
                });
                mEdSendText.setText("");
                break;
        }
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        //获取图片路径
        if (requestCode == IMAGE && resultCode == Activity.RESULT_OK && data != null) {
            Uri selectedImage = data.getData();
            //将uri转换为路径
            String path = RealPathFromUriUtils.getRealPathFromUri(this, selectedImage);
            File file = new File(path);
            String account = "1";//目前这里是写死的账号
            IMMessage message = MessageBuilder.createImageMessage(account, SessionTypeEnum.P2P, file, file.getName());
            NIMClient.getService(MsgService.class).sendMessage(message, false).setCallback(new RequestCallback() {
                @Override
                public void onSuccess(Void param) {
                    try {
                        ToastUtil.toastOnUiThread(SendMessageActivity.this, "发送成功");
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }

                @Override
                public void onFailed(int code) {
                    Log.e("图片发送失败", "onEvent: " + code);
                }

                @Override
                public void onException(Throwable exception) {
                    exception.printStackTrace();
                    Log.e("图片发送异常", "onEvent: " + exception);
                }
            });
        }
    }

    //收到文本消息更新界面
    public static void updateData(String message) {
        mTvReceiveMessage.setText(message);
    }

    //收到图片消息更新界面
    public static void updateData1(String message) {
        mIvReceiveMessage.setImageURI(Uri.parse(message));
    }

    class MyServiceConnection implements ServiceConnection {

        @Override
        public void onServiceConnected(ComponentName name, IBinder service) {
            System.out
                    .println("--------------onServiceConnected--------------");
            IMService.MyBinder binder = (IMService.MyBinder) service;
            mImService = binder.getService();
        }

        @Override
        public void onServiceDisconnected(ComponentName name) {
            System.out
                    .println("--------------onServiceDisconnected--------------");

        }
    }

}

RealPathFromUriUtils这个是将URI转换为路径的文件

package heath.com.chat.utils;

import android.annotation.SuppressLint;
import android.content.ContentUris;
import android.content.Context;
import android.database.Cursor;
import android.net.Uri;
import android.os.Build;
import android.provider.DocumentsContract;
import android.provider.MediaStore;

public class RealPathFromUriUtils {
    /**
     * 根据Uri获取图片的绝对路径
     *
     * @param context 上下文对象
     * @param uri     图片的Uri
     * @return 如果Uri对应的图片存在, 那么返回该图片的绝对路径, 否则返回null
     */
    public static String getRealPathFromUri(Context context, Uri uri) {
        int sdkVersion = Build.VERSION.SDK_INT;
        if (sdkVersion >= 19) { // api >= 19
            return getRealPathFromUriAboveApi19(context, uri);
        } else { // api < 19
            return getRealPathFromUriBelowAPI19(context, uri);
        }
    }

    /**
     * 适配api19以下(不包括api19),根据uri获取图片的绝对路径
     *
     * @param context 上下文对象
     * @param uri     图片的Uri
     * @return 如果Uri对应的图片存在, 那么返回该图片的绝对路径, 否则返回null
     */
    private static String getRealPathFromUriBelowAPI19(Context context, Uri uri) {
        return getDataColumn(context, uri, null, null);
    }

    /**
     * 适配api19及以上,根据uri获取图片的绝对路径
     *
     * @param context 上下文对象
     * @param uri     图片的Uri
     * @return 如果Uri对应的图片存在, 那么返回该图片的绝对路径, 否则返回null
     */
    @SuppressLint("NewApi")
    private static String getRealPathFromUriAboveApi19(Context context, Uri uri) {
        String filePath = null;
        if (DocumentsContract.isDocumentUri(context, uri)) {
            // 如果是document类型的 uri, 则通过document id来进行处理
            String documentId = DocumentsContract.getDocumentId(uri);
            if (isMediaDocument(uri)) { // MediaProvider
                // 使用':'分割
                String id = documentId.split(":")[1];

                String selection = MediaStore.Images.Media._ID + "=?";
                String[] selectionArgs = {id};
                filePath = getDataColumn(context, MediaStore.Images.Media.EXTERNAL_CONTENT_URI, selection, selectionArgs);
            } else if (isDownloadsDocument(uri)) { // DownloadsProvider
                Uri contentUri = ContentUris.withAppendedId(Uri.parse("content://downloads/public_downloads"), Long.valueOf(documentId));
                filePath = getDataColumn(context, contentUri, null, null);
            }
        } else if ("content".equalsIgnoreCase(uri.getScheme())) {
            // 如果是 content 类型的 Uri
            filePath = getDataColumn(context, uri, null, null);
        } else if ("file".equals(uri.getScheme())) {
            // 如果是 file 类型的 Uri,直接获取图片对应的路径
            filePath = uri.getPath();
        }
        return filePath;
    }

    /**
     * 获取数据库表中的 _data 列，即返回Uri对应的文件路径
     *
     * @return
     */
    private static String getDataColumn(Context context, Uri uri, String selection, String[] selectionArgs) {
        String path = null;

        String[] projection = new String[]{MediaStore.Images.Media.DATA};
        Cursor cursor = null;
        try {
            cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs, null);
            if (cursor != null && cursor.moveToFirst()) {
                int columnIndex = cursor.getColumnIndexOrThrow(projection[0]);
                path = cursor.getString(columnIndex);
            }
        } catch (Exception e) {
            if (cursor != null) {
                cursor.close();
            }
        }
        return path;
    }

    /**
     * @param uri the Uri to check
     * @return Whether the Uri authority is MediaProvider
     */
    private static boolean isMediaDocument(Uri uri) {
        return "com.android.providers.media.documents".equals(uri.getAuthority());
    }

    /**
     * @param uri the Uri to check
     * @return Whether the Uri authority is DownloadsProvider
     */
    private static boolean isDownloadsDocument(Uri uri) {
        return "com.android.providers.downloads.documents".equals(uri.getAuthority());
    }
}

在IMService添加接收图片的消息处理

private Observer statusObserver = new Observer() {
        @Override
        public void onEvent(IMMessage message) {
            if (message.getDirect() == MsgDirectionEnum.In) {
                if (message.getAttachStatus() == AttachStatusEnum.transferred) {
                    if (message.getMsgType() == MsgTypeEnum.image) {
                        //这里是图片下载成功
                        SendMessageActivity.updateData1(((ImageAttachment) message.getAttachment()).getThumbPath());
                    }
                }
            }
        }
    };

在IMService注册statusObserver和注销

在TabHostActivity增加加载动态权限

 private void open() {
        if (Build.VERSION.SDK_INT >= 23) {
            int REQUEST_CODE_CONTACT = 101;
            String[] permissions = {android.Manifest.permission.WRITE_EXTERNAL_STORAGE, android.Manifest.permission.CAMERA};
            //验证是否许可权限
            for (String str : permissions) {
                if (this.checkSelfPermission(str) != PackageManager.PERMISSION_GRANTED) {
                    //申请权限
                    this.requestPermissions(permissions, REQUEST_CODE_CONTACT);
                }
            }
        }
    }

 项目下载地址：https://download.csdn.net/download/qq_32090185/11122479