这大概是什么原因导致的?错误如下:
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.easyboardview/com.example.easyboardview.MainActivity}: android.view.InflateException: Binary XML file line #8: Error inflating class android.widget.ImageView
这部分是我的代码:
package com.example.easyboardview;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.animation.Animation;
import android.view.animation.RotateAnimation;
import android.widget.ImageView;
import java.util.Timer;
import java.util.TimerTask;
public class MainActivity extends Activity {
//指针图片
private ImageView needleView;
//时间
private Timer timer;
//记录指针旋转
private float degree = 0.0f;
@SuppressLint("HandlerLeak")
private final Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
//设置仪表盘指针转动动画
//仪表盘最大是172度,这个是自己测出来的
if (degree >= 172.0f) {
timer.cancel();
}
degree += 2.0f;
RotateAnimation animation = new RotateAnimation(degree, degree, Animation.RELATIVE_TO_SELF, 0.5f,
Animation.RELATIVE_TO_SELF, 0.5f);
animation.setDuration(1000);
animation.setFillAfter(true);
needleView.startAnimation(animation);
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
needleView = findViewById(R.id.needle);
// 开始转动
timer = new Timer();
// 设置每一秒转动一下
timer.schedule(new NeedleTask(), 0, 1000);
}
private class NeedleTask extends TimerTask {
@Override
public void run() {
handler.sendEmptyMessage(0);
}
}
}
这部分是我的xml文件:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
tools:context=".MainActivity"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ImageView
android:layout_width="270dp"
android:layout_height="270dp"
android:layout_centerHorizontal="true"
android:layout_marginTop="20dp"
android:src="@drawable/panel" />
<ImageView
android:id="@+id/needle"
android:layout_width="270dp"
android:layout_height="270dp"
android:layout_centerHorizontal="true"
android:layout_marginTop="20dp"
android:src="@drawable/needle" />
</RelativeLayout>