71MainActivity中连接的监听

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创建一个内部类，实现EMConnectionListener接口，该接口实现了两个方法，一个是连接上的方法，在该方法中，去掉网络断开的可见，在连接不上的方法中，做出相应的处理。

 /**     * 连接监听listener     *      */    private class MyConnectionListener implements EMConnectionListener {        @Override        public void onConnected() {            runOnUiThread(new Runnable() {                @Override                public void run() {                    chatHistoryFragment.errorItem.setVisibility(View.GONE);                }            });        }        @Override        public void onDisconnected(final int error) {            runOnUiThread(new Runnable() {                @Override                public void run() {                    if (error == EMError.USER_REMOVED) {                        // 显示帐号已经被移除                        showAccountRemovedDialog();                    } else if (error == EMError.CONNECTION_CONFLICT) {                        // 显示帐号在其他设备登陆dialog                        showConflictDialog();                    } else {                        chatHistoryFragment.errorItem                                .setVisibility(View.VISIBLE);                        if (NetUtils.hasNetwork(MainActivity.this))                            chatHistoryFragment.errorText.setText("连接不到聊天服务器");                        else                            chatHistoryFragment.errorText                                    .setText("当前网络不可用，请检查网络设置");                    }                }            });        }    }

剩下的两个方法：

/**     * 显示帐号在别处登录dialog     */    private void showConflictDialog() {        isConflictDialogShow = true;        IMApplication.getInstance().logout(null);        if (!MainActivity.this.isFinishing()) {            // clear up global variables            try {                if (conflictBuilder == null)                    conflictBuilder = new android.app.AlertDialog.Builder(                            MainActivity.this);                conflictBuilder.setTitle("下线通知");                conflictBuilder.setMessage(R.string.connect_conflict);                conflictBuilder.setPositiveButton(R.string.ok,                        new DialogInterface.OnClickListener() {                            @Override                            public void onClick(DialogInterface dialog,                                    int which) {                                dialog.dismiss();                                conflictBuilder = null;                                finish();                                startActivity(new Intent(MainActivity.this,                                        LoginActivity.class));                            }                        });                conflictBuilder.setCancelable(false);                conflictBuilder.create().show();                isConflict = true;            } catch (Exception e) {                EMLog.e(TAG,                        "---------color conflictBuilder error" + e.getMessage());            }        }    }    /**     * 帐号被移除的dialog     */    private void showAccountRemovedDialog() {        isAccountRemovedDialogShow = true;        IMApplication.getInstance().logout(null);        if (!MainActivity.this.isFinishing()) {            // clear up global variables            try {                if (accountRemovedBuilder == null)                    accountRemovedBuilder = new android.app.AlertDialog.Builder(                            MainActivity.this);                accountRemovedBuilder.setTitle("移除通知");                accountRemovedBuilder.setMessage(R.string.em_user_remove);                accountRemovedBuilder.setPositiveButton(R.string.ok,                        new DialogInterface.OnClickListener() {                            @Override                            public void onClick(DialogInterface dialog,                                    int which) {                                dialog.dismiss();                                accountRemovedBuilder = null;                                finish();                                startActivity(new Intent(MainActivity.this,                                        LoginActivity.class));                            }                        });                accountRemovedBuilder.setCancelable(false);                accountRemovedBuilder.create().show();                isCurrentAccountRemoved = true;            } catch (Exception e) {                EMLog.e(TAG,                        "---------color userRemovedBuilder error"                                + e.getMessage());            }        }    }

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