Android(安卓)TV，机顶盒Gridview 焦点

切换两个控件之间的焦点，TV、机顶盒用android自带的控件例如listview或者gridview 是，因为需要适配手机等，所以控件某些方面（如每个控件的焦点，切换时的速度，位置等）是不会很匹配TV、机顶盒的.最好的方法是自己绘制一个gridview

正常的GridView，然而item的控件就需要自定义了：
MyImageView

import android.annotation.SuppressLint;import android.content.Context;import android.graphics.Color;import android.graphics.Rect;import android.util.AttributeSet;import android.widget.ImageView;@SuppressLint("AppCompatCustomView")public class MyImageView extends ImageView {    public MyImageView(Context context, AttributeSet attrs, int defStyle) {        super(context, attrs, defStyle);    }    public MyImageView(Context context, AttributeSet attrs) {        super(context, attrs);    }    public MyImageView(Context context) {        super(context);    }    @Override    protected void onFocusChanged(boolean gainFocus, int direction, Rect previouslyFocusedRect) {        super.onFocusChanged(gainFocus, direction, previouslyFocusedRect);        if (gainFocus) {            setBackgroundColor(Color.rgb(255, 138, 0));        } else {            // 此处为去掉控件高亮显示            setBackgroundColor(0);        }    }}

MyTextView

import android.annotation.SuppressLint;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Rect;import android.util.AttributeSet;import android.util.Log;import android.view.KeyEvent;import android.widget.TextView;@SuppressLint("AppCompatCustomView")public class MyTextView extends TextView {    private static final String TAG = "textview";    @Override    protected void onDraw(Canvas canvas) {        super.onDraw(canvas);    }    @Override    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {        // TODO Auto-generated method stub        super.onFocusChanged(focused, direction, previouslyFocusedRect);        // 此处为该控件获得焦点后高亮显示        if (focused) {            setBackgroundColor(Color.rgb(255, 138, 0));        } else {            // 此处为去掉控件高亮显示            setBackgroundColor(0);        }    }    @Override    public boolean onKeyDown(int keyCode, KeyEvent event) {        Log.d("onkeydown", "onkeydown");        return super.onKeyDown(keyCode, event);    }    public MyTextView(Context context) {        super(context);    }    public MyTextView(Context context, AttributeSet attrs) {        super(context, attrs);    }    public MyTextView(Context context, AttributeSet attrs, int defStyle) {        super(context, attrs, defStyle);    }}

item引用

<?xml version="1.0" encoding="utf-8"?>

更多相关文章

随机推荐