自定义View之自定义标题栏

//MainActivity中使用

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.ff.customtitle.MainActivity"
    >

    <com.ff.customtitle.MyTitleView
        android:id="@+id/mytitleview"
        android:layout_width="match_parent"
        android:layout_height="80dp"
        app:Layout_bg_Color="#ffff00"
        app:Title_Image="@mipmap/goback"
        app:Title_Text="自定义标题"
        app:Title_TextColor="#ff0000"
        app:Title_TextSize="25sp"
        ></com.ff.customtitle.MyTitleView>


</LinearLayout>

//在自定义中引用的布局

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/layout"
    android:layout_width="match_parent"
    android:layout_height="80dp"
    android:background="#f00">

    <ImageView
        android:id="@+id/Title_icon"
        android:layout_width="50dp"
        android:layout_height="50dp"
        android:layout_centerVertical="true"
        android:layout_marginLeft="15dp"
        android:src="@mipmap/ic_launcher_round" />

    <TextView
        android:id="@+id/Title_ext"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:text="标题" />

</RelativeLayout>
//下面是自定义View继承了LinearLayout

public class MyTitleView extends LinearLayout {

    private ImageView img;
    private TextView title_text;
    private RelativeLayout layout;
    private int bg_color;
    private int title_textColor;
    private String Text;
    private float title_textSize;
    private Drawable title_image;

    public MyTitleView(Context context) {
        super(context);
        initView(context, null);
    }

    public MyTitleView(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
        initView(context, attrs);
    }

    private void initView(Context context, @Nullable AttributeSet attrs) {
        View view = LayoutInflater.from(context).inflate(R.layout.mytitle, this);
        img = (ImageView) view.findViewById(R.id.Title_icon);
        title_text = (TextView) view.findViewById(R.id.Title_ext);
        layout = (RelativeLayout) view.findViewById(R.id.layout);
        if (attrs == null) {
            return;
        }
        //得到attrs布局文件
        initAttrs(context, attrs);
        //把得到的atrrs属性设置到控件上
        setViewContent();
//        创建点击事件
        img.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                myTitleViewClickListener.OnClick(v);
            }
        });

    }

    private OnMyTitleViewClickListener myTitleViewClickListener;

    public interface OnMyTitleViewClickListener {
        void OnClick(View view);
    }

    public void setOnMyTitleViewClickListener(OnMyTitleViewClickListener myTitleViewClickListener) {
        this.myTitleViewClickListener = myTitleViewClickListener;
    }

    //把得到的atrrs属性设置到控件上
    private void setViewContent() {
        img.setImageDrawable(title_image);
        layout.setBackgroundColor(bg_color);
        title_text.setText(Text);
        title_text.setTextColor(title_textColor);
        title_text.setTextSize(title_textSize);
    }

    //得到attrs布局文件
    private void initAttrs(Context context, @Nullable AttributeSet attrs) {
        TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.MyTitleView);
        bg_color = typedArray.getColor(R.styleable.MyTitleView_Layout_bg_Color, Color.RED);
        title_textColor = typedArray.getColor(R.styleable.MyTitleView_Title_TextColor, Color.BLACK);
        Text = typedArray.getString(R.styleable.MyTitleView_Title_Text);
        title_textSize = typedArray.getDimension(R.styleable.MyTitleView_Title_TextSize, 15);
        title_image = typedArray.getDrawable(R.styleable.MyTitleView_Title_Image);
    }

}
//MainActivity中使用

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        MyTitleView viewById = (MyTitleView) findViewById(R.id.mytitleview);
        viewById.setOnMyTitleViewClickListener(new MyTitleView.OnMyTitleViewClickListener() {
            @Override
            public void OnClick(View view) {
                
            }
        });

    }
}
//values 文件夹下面自定义attrs设置自定义属性

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <declare-styleable name="MyTitleView">
        <attr name="Layout_bg_Color" format="color"></attr>
        <attr name="Title_TextColor" format="color"></attr>
        <attr name="Title_Text" format="string"></attr>
        <attr name="Title_TextSize" format="dimension"></attr>
        <attr name="Title_Image" format="reference"></attr>
    </declare-styleable>
</resources>