pjsip视频通信开发(上层应用)之拨号键盘下部份拨号和删除功能

我们开发的是视频电话，所以既可以视频通话，可以只有音频的通话，所以底部含有两个按钮，最后一个就是删除功能，如果输入错误，我们可以删除输入的内容。

这里我们要通过重写LinearLayout来实现这部份，对应着上面的功能我们可以写一个接口来实现这些功能，如下：

 

public interface OnDialActionListener {

        /**

         * The make call button has been pressed

         */

        void placeCall();



        /**

         * The video button has been pressed

         */

        void placeVideoCall();

        /**

         * The delete button has been pressed

         */

        void deleteChar();

        /**

         * The delete button has been long pressed

         */

        void deleteAll();

    }

通过回调来在主界面实现这些功能。例如在OnClick函数中

 

 

 @Override

    public void onClick(View v) {

        if (actionListener != null) {

            int viewId = v.getId();

            if (viewId == R.id.dialVideoButton) {

                actionListener.placeVideoCall();

            }else if(viewId == R.id.dialButton) {

                actionListener.placeCall();

            }else if(viewId == R.id.deleteButton) {

                actionListener.deleteChar();

            }

        }

    }

我们可以通过本地的接口来实现内部函数，然后在主界面实例化这个接口并填写接口的实现方式。整体的代码如下：

 

 

package com.jwzhangjie.pjsip.widgets;



import com.jwzhangjie.pjsip.R;



import android.content.Context;

import android.util.AttributeSet;

import android.view.Gravity;

import android.view.LayoutInflater;

import android.view.View;

import android.view.View.OnClickListener;

import android.view.View.OnLongClickListener;

import android.widget.LinearLayout;



public class DialerCallBar extends LinearLayout implements OnClickListener, OnLongClickListener {



    public interface OnDialActionListener {

        /**

         * The make call button has been pressed

         */

        void placeCall();



        /**

         * The video button has been pressed

         */

        void placeVideoCall();

        /**

         * The delete button has been pressed

         */

        void deleteChar();

        /**

         * The delete button has been long pressed

         */

        void deleteAll();

    }



    private OnDialActionListener actionListener;

    

    public DialerCallBar(Context context) {

        this(context, null, 0);

    }



    public DialerCallBar(Context context, AttributeSet attrs) {

        this(context, attrs, 0);

    }

    

    public DialerCallBar(Context context, AttributeSet attrs, int style) {

        super(context, attrs);

        LayoutInflater inflater = LayoutInflater.from(context);

        inflater.inflate(R.layout.dialpad_additional_buttons, this, true);

        findViewById(R.id.dialVideoButton).setOnClickListener(this);

        findViewById(R.id.dialButton).setOnClickListener(this);

        findViewById(R.id.deleteButton).setOnClickListener(this);

        findViewById(R.id.deleteButton).setOnLongClickListener(this);

        

        if(getOrientation() == LinearLayout.VERTICAL) {

            LayoutParams lp;

            for(int i=0; i < getChildCount(); i++) {

                lp = (LayoutParams) getChildAt(i).getLayoutParams();

                int w = lp.width;

                lp.width = lp.height;

                lp.height = w;

                lp.gravity = Gravity.CENTER_HORIZONTAL;

                // Added for clarity but not necessary

                getChildAt(i).setLayoutParams(lp);

                

            }

        }

    }



    /**

     * Set a listener for this widget actions

     * @param l the listener called back when some user action is done on this widget

     */

    public void setOnDialActionListener(OnDialActionListener l) {

        actionListener = l;

    }

    

    /**

     * Set the action buttons enabled or not

     */

    public void setEnabled(boolean enabled) {

        findViewById(R.id.dialButton).setEnabled(enabled);

        findViewById(R.id.dialVideoButton).setEnabled(enabled);

        findViewById(R.id.deleteButton).setEnabled(enabled);

    }

    

    @Override

    public void onClick(View v) {

        if (actionListener != null) {

            int viewId = v.getId();

            if (viewId == R.id.dialVideoButton) {

                actionListener.placeVideoCall();

            }else if(viewId == R.id.dialButton) {

                actionListener.placeCall();

            }else if(viewId == R.id.deleteButton) {

                actionListener.deleteChar();

            }

        }

    }



    @Override

    public boolean onLongClick(View v) {

        if (actionListener != null) {

            int viewId = v.getId();

            if(viewId == R.id.deleteButton) {

                actionListener.deleteAll();

                v.setPressed(false);

                return true;

            }

        }

        return false;

    }



}