Question

我必须在我的android应用程序中创建一个自定义视图，因为我编写了如下代码

XML

<com.package.custom.CustomView
    android:id="@+id/my_view"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"/>

CustomView.java

package com.package.custom;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.view.View;

public class CustomView extends View {

    Paint customPaint;

    public CustomView(Context context) {
        super(context);
        customPaint = new Paint();
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        int width = this.getMeasuredWidth();
        int height = this.getMeasuredHeight();
        customPaint.setStyle(Paint.Style.FILL);
        customPaint.setAntiAlias(true);
        customPaint.setColor(getResources().getColor(android.R.color.holo_blue_dark));
        canvas.drawPaint(customPaint);
    }
}

活动

public class CustomViewActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_custom_button);
        CustomView customView = (CustomView) findViewById(R.id.my_view);

    }   
}

但是当我运行应用程序时，我收到错误::

3178-3178/com.package.custom E/AndroidRuntime﹕ FATAL EXCEPTION: main
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.package.custom/com.package.custom.CustomViewActivity}: android.view.InflateException: Binary XML file line #11: Error inflating class com.package.custom.CustomView
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2255)

是什么原因？我的代码有什么问题吗？我该如何解决这个问题？

Answer 1

尝试改变：

public class CustomView extends TextView {

    Paint customPaint;

    public CustomView(Context context, AttributeSet attrs) {
    super(context, attrs);
    customPaint = new Paint();
}

类构造函数的名称不相同。

View类没有方法android:text=""将基类更改为TextView

android中的CustomView抛出膨胀异常

1 个答案: