android 电视机顶盒开发 安卓机顶盒开发

前言

金三银四之际被离职，入职了一家TV开发的公司。入职一月，简单总结下TV开发需要注意的一些东西。

知识点

适配

试用了一下sw 即最小宽度适配（推荐此适配方法）
1280*720 对应的分辨率 mdpi
具体这方面分析的文章有很多 也很全面，不多哔哔。
 

常用adb

adb connect ip:port
adb shell am start packet/packet.Main
adb root (获取root权限)
adb install
adb uninstall
adb shell (进linux)

布局及处理

先上几个图片

模板有好几套，由于后台直接返的是html里的table表格 所以要用jsoup自己去转换，因为portal模板是后台动态创建的，一开始想自定义GridLayout来实现 后来发现挑起来问题挺多，加上工期紧张，暂定写死5套模板，根据td数量决定用哪套模板。

在手机端中，主要靠点击事件，大部分情况不用主观通知用户焦点所在位置，tv端则不是，主要靠焦点高亮来通知。主要有以下几种方式：

• drawable目录下创建 selector ：

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:state_focused="true" android:drawable="@mipmap/bill_focus"></item>
    <item android:drawable="@mipmap/bill"></item>
</selector>

• View设置onFoucsChangeListener,然后根据状态更改背景：

private View.OnFocusChangeListener titlefocusChangeListener = new View.OnFocusChangeListener() {
        @Override
        public void onFocusChange(View v, boolean hasFocus) {
            int id = v.getId();
            for (int i = 0 ;i < ll_title.getChildCount();i++){
                if(id == ll_title.getChildAt(i).getId()){
                    Button btn  = (Button) ll_title.getChildAt(i);
                    if(hasFocus){
                        resetTitleColor();
                        setTab(i);
                        btn.setTextSize(AppConfig.HOME_TITLE_SIZE_CHECKED);
                        btn.setTextColor(Color.WHITE);
                    }else {
                        btn.setTextSize(AppConfig.HOME_TILE_SIZE_NORMAL);
                        if(i == select_index)
                            btn.setTextColor(getResources().getColor(R.color.title_blue));
                        else
                            btn.setTextColor(getResources().getColor(R.color.title_grey));
                    }
                    break;
                }
            }
        }
    };

接下来就是焦点的处理，同阶级布局可直接在代码中写死：

<View
        android:layout_width="30dp"
        android:layout_height="30dp"
        android:focusable="true"
        android:nextFocusDown="@null"
        android:nextFocusLeft="@null"
        android:nextFocusRight="@null"
        android:nextFocusUp="@null" />

其余的需要自己判断 （Android系统的处理方式是就近原则，获取所有view的位置然后算距离方向最近的view）比如在我的项目中 如果移动到了最右边，再按右键则应跳转至下一个页面。或者顶部再按上应title获取焦点,再上菜单获取焦点。

具体的处理方式可以参考以下代码：

@Override
    public boolean dispatchKeyEvent(KeyEvent event) {
        LogService.e(TAG,"Action:" +event.getKeyCode());
        if(frags[select_index] == null){
            return super.dispatchKeyEvent(event);
        }
        if(event.getAction() == KeyEvent.ACTION_DOWN) {
            if (event.getKeyCode() == KeyEvent.KEYCODE_DPAD_DOWN) {
                if (MainUtils.getFocusToolBarIndex(toolViews) != -1) {//顶部焦点 直接
                    ll_title.getChildAt(select_index).requestFocus();
                    return true;
                }
                if (MainUtils.isFocusinTitle(ll_title)) {// 焦点在标题
                    frags[select_index].childViewrequestFocus(0);
                    return true;
                }
            }
            if (event.getKeyCode() == KeyEvent.KEYCODE_DPAD_UP) {
                if (MainUtils.getFocusToolBarIndex(toolViews) != -1) {//顶部焦点 直接
                    return true;
                }
                if (MainUtils.isFocusinTitle(ll_title)) {// 焦点在标题
                    btn_search.requestFocus();
                    return true;
                }
                if (frags[select_index].isOnTopSide()) {
                    ll_title.getChildAt(select_index).requestFocus();
                    return true;
                }
            }

            if (event.getKeyCode() == KeyEvent.KEYCODE_DPAD_LEFT) {
                if (btn_search.isFocused()) {
                    ll_title.getChildAt(select_index).requestFocus();
                    return true;
                }

                if (frags[select_index].isOnLeftSide() && select_index != 0) {
                    setTab(select_index - 1);
                    frags[select_index].childViewrequestFocus(1);
                    resetTitleColor();
                    ((Button)ll_title.getChildAt(select_index)).setTextColor(getResources().getColor(R.color.title_blue));
                    return true;
                }
            }
            if (event.getKeyCode() == KeyEvent.KEYCODE_DPAD_RIGHT) {
                if (ll_title.getChildAt(ll_title.getChildCount() - 1).isFocused()) {
                    btn_search.requestFocus();
                    return true;
                }

                if (frags[select_index].isOnRightSide() && select_index != ll_title.getChildCount() - 1) {
                    setTab(select_index + 1);
                    frags[select_index].childViewrequestFocus(0);
                    resetTitleColor();
                    ((Button)ll_title.getChildAt(select_index)).setTextColor(getResources().getColor(R.color.title_blue));
                    return true;
                }
            }
        }


        return super.dispatchKeyEvent(event);
    }

自己屡一下逻辑即可。

提供一些常用的KeyCode:

public static final int KEYCODE_DPAD_UP         = 19;
    /** Key code constant: Directional Pad Down key.
     * May also be synthesized from trackball motions. */
    public static final int KEYCODE_DPAD_DOWN       = 20;
    /** Key code constant: Directional Pad Left key.
     * May also be synthesized from trackball motions. */
    public static final int KEYCODE_DPAD_LEFT       = 21;
    /** Key code constant: Directional Pad Right key.
     * May also be synthesized from trackball motions. */
    public static final int KEYCODE_DPAD_RIGHT      = 22;
    /** Key code constant: Directional Pad Center key.
     * May also be synthesized from trackball motions. */
    public static final int KEYCODE_DPAD_CENTER     = 23;
    /** Key code constant: Home key.
     * This key is handled by the framework and is never delivered to applications. */
    public static final int KEYCODE_HOME            = 3;
    /** Key code constant: Back key. */
    public static final int KEYCODE_BACK            = 4;
    /** Key code constant: A Button key.
     * On a game controller, the A button should be either the button labeled A
     * or the first button on the bottom row of controller buttons. */
    public static final int KEYCODE_BUTTON_A        = 96;
    /** Key code constant: B Button key.
     * On a game controller, the B button should be either the button labeled B
     * or the second button on the bottom row of controller buttons. */
    public static final int KEYCODE_BUTTON_B        = 97;
    /** Key code constant: C Button key.
     * On a game controller, the C button should be either the button labeled C
     * or the third button on the bottom row of controller buttons. */
    public static final int KEYCODE_BUTTON_C        = 98;
    /** Key code constant: X Button key.
     * On a game controller, the X button should be either the button labeled X
     * or the first button on the upper row of controller buttons. */
    public static final int KEYCODE_BUTTON_X        = 99;
    /** Key code constant: Y Button key.
     * On a game controller, the Y button should be either the button labeled Y
     * or the second button on the upper row of controller buttons. */
    public static final int KEYCODE_BUTTON_Y        = 100;

大部分手柄厂家在GamePad模式下适配A对应确定键 B对应back键
判断触发案件的设备方法：

if(event.getSource() == InputDevice.SOURCE_GAMEPAD){//手柄模式，其他自己看源码
            
        }

待研发

• 动态布局(暂时想法是GridLayout 有想法可以提出 一起讨论)
• 焦点动画（偏向于用位移动画去做）
• 支付模块抽离
• ending