Android 自定义组合控件实例

参考自：https://blog.csdn.net/itachi85/article/details/51435187

一、定义组合控件的布局

• view_customtitle.xml

二、通过自定义属性控制内容样式

• 在values目录下创建 attrs.xml

三、通过自定义View组合控件

• TitleBar.class

public class TitleBar extends RelativeLayout {
    private ImageView iv_titlebar_left;
    private ImageView iv_titlebar_right;
    private TextView tv_titlebar_title;
    private RelativeLayout layout_titlebar_rootlayout;
    private int mColor = Color.BLUE;
    private int mTextColor = Color.WHITE;
    private String titlename;

    public TitleBar(Context context) {
        super(context);
        initView(context);
    }

    public TitleBar(Context context, AttributeSet attrs) {
        super(context, attrs);
        initTypedArray(context, attrs);
        initView(context);
    }


    public TitleBar(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        initTypedArray(context, attrs);
        initView(context);
    }

    private void initTypedArray(Context context, AttributeSet attrs) {
        TypedArray mTypedArray = context.obtainStyledAttributes(attrs, R.styleable.TitleBar);
        mColor = mTypedArray.getColor(R.styleable.TitleBar_title_bg, Color.BLUE);
        mTextColor = mTypedArray.getColor(R.styleable.TitleBar_title_text_color, Color.WHITE);
        titlename = mTypedArray.getString(R.styleable.TitleBar_title_text);
        //获取资源后要及时回收
        mTypedArray.recycle();
    }

    private void initView(Context context) {
        LayoutInflater.from(context).inflate(R.layout.view_customtitle, this, true);
        iv_titlebar_left = (ImageView) findViewById(R.id.iv_titlebar_left);
        iv_titlebar_right = (ImageView) findViewById(R.id.iv_titlebar_right);
        tv_titlebar_title = (TextView) findViewById(R.id.tv_titlebar_title);
        layout_titlebar_rootlayout = (RelativeLayout) findViewById(R.id.layout_titlebar_rootlayout);
        //设置背景颜色
        layout_titlebar_rootlayout.setBackgroundColor(mColor);
        //设置标题文字颜色
        tv_titlebar_title.setTextColor(mTextColor);
        setTitle(titlename);
    }

    public void setTitle(String titlename) {
        if (!TextUtils.isEmpty(titlename)) {
            tv_titlebar_title.setText(titlename);
        }
    }

    public void setLeftListener(OnClickListener onClickListener) {
        iv_titlebar_left.setOnClickListener(onClickListener);
    }

    public void setRightListener(OnClickListener onClickListener) {
        iv_titlebar_right.setOnClickListener(onClickListener);
    }
}

四、XML中引用组合控件

五、Java代码中调用组合控件

public class MainActivity extends Activity {
    private TitleBar mTitleBar;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mTitleBar= (TitleBar) this.findViewById(R.id.title);
//      mTitleBar.setTitle("自定义组合控件");

        mTitleBar.setLeftListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(MainActivity.this, "点击左键", Toast.LENGTH_SHORT).show();
            }
        });

        mTitleBar.setRightListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(MainActivity.this, "点击右键", Toast.LENGTH_SHORT).show();
            }
        });
    }
}