创建自定义属性
在res/values中创建名为attrs的文件。
定义2个属性，分别是左边按钮和右边按钮，值是drawable，所以格式应该为refrence。
<?xml version="1.0" encoding="utf-8"?> <resources> <declare-styleable name="MyTopBar"> <attr name="leftButton" format="reference" /> <attr name="rightButton" format="reference" /> </declare-styleable> </resources>
创建自定义视图类
创建自定义view类，并继承自RelativeLayout。
/** * Created by ado on 1:49 2016/10/17. */ public class MyTopBar extends RelativeLayout { private Context mContext; //两张图片 private Drawable leftResId, rightResId; //左右按钮 private ImageButton leftButton, rightButton; //两个按钮的点击回调接口 private OnLeftClickListener onLeftClickListener; private OnRightClickListener onRightClickListener; public MyTopBar(Context context, AttributeSet attrs) { super(context, attrs); mContext = context; initAttr(attrs); initUi(); setlistener(); } private void initAttr(AttributeSet attrs) { //获取两张图片的drawalbe TypedArray typedArray = mContext.getTheme().obtainStyledAttributes(attrs, R.styleable.MyTopBar, 0, 0); leftResId = typedArray.getDrawable(R.styleable.MyTopBar_leftButton); rightResId = typedArray.getDrawable(R.styleable.MyTopBar_rightButton); //获取完了记得回收对象 typedArray.recycle(); } private void initUi() { //创建布局参数 LayoutParams params1 = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); LayoutParams params2 = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); //设置左右按钮分别对齐父布局的左右两边 params1.addRule(ALIGN_PARENT_LEFT); params2.addRule(ALIGN_PARENT_RIGHT); //创建左右按钮 leftButton = new ImageButton(mContext); rightButton = new ImageButton(mContext); //因为是ImageButton，所以需要设置背景为全透明 leftButton.setBackgroundResource(R.color.bg_alpha); rightButton.setBackgroundResource(R.color.bg_alpha); //设置对应的图片 leftButton.setImageDrawable(leftResId); rightButton.setImageDrawable(rightResId); //将两个按钮添加到父布局 addView(leftButton, params1); addView(rightButton, params2); } private void setlistener() { //为2个按钮设置点击回调 leftButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View view) { if (null != onLeftClickListener) { onLeftClickListener.onClick(view); } } }); rightButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View view) { if (null != onRightClickListener) { onRightClickListener.onClick(view); } } }); } //return 自定义view对象，链式编程 public MyTopBar setOnLeftButtonClickListener(OnLeftClickListener onLeftButtonClickListener) { this.onLeftClickListener = onLeftButtonClickListener; return this; } public MyTopBar setOnRightButtonClickListener(OnRightClickListener onRightButtonClickListener) { this.onRightClickListener = onRightButtonClickListener; return this; } public interface OnLeftClickListener { void onClick(View view); } public interface OnRightClickListener { void onClick(View view); } }
在布局中使用
<com.ado.video.ui.view.MyTopBar android:id="@+id/topbar" android:layout_width="match_parent" android:layout_height="wrap_content" app:leftButton="@android:drawable/ic_menu_share" app:rightButton="@android:drawable/ic_media_pause" android:background="#7c7b7b"/>
在activity中使用
@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); myTopBar = (MyTopBar) findViewById(R.id.topbar); myTopBar.setOnLeftButtonClickListener(new MyTopBar.OnLeftClickListener() { @Override public void onClick(View view) { Logger.i("左边点击了========================"); Toast.makeText(getApplicationContext(), "左边", Toast.LENGTH_SHORT).show(); } }).setOnRightButtonClickListener(new MyTopBar.OnRightClickListener() { @Override public void onClick(View view) { Logger.i("右边点击了========================"); Toast.makeText(getApplicationContext(), "右边", Toast.LENGTH_SHORT).show(); } }); }
