Android - 子类化 ImageView - 膨胀类时出错

Question

所以我知道"错误膨胀类"通常是因为缺少或格式错误的构造函数......但是我让日食生成它们，它们看起来与我见过的其他例子相似。该错误指向我的 XML 文件，我正在尝试将自定义类添加到我的布局中。

我假设我必须声明扩展的 ImageView 一些方法，但我不知道该怎么做。您能提供的任何帮助将不胜感激。

错误

06-27 09:12:18.655: D/AndroidRuntime(1487): Shutting down VM
06-27 09:12:18.655: W/dalvikvm(1487): threadid=1: thread exiting with uncaught exception (group=0x409c01f8)
06-27 09:12:18.675: I/dalvikvm(1487): threadid=3: reacting to signal 3
06-27 09:12:18.715: I/dalvikvm(1487): Wrote stack traces to '/data/anr/traces.txt'
06-27 09:12:18.755: E/AndroidRuntime(1487): FATAL EXCEPTION: main
06-27 09:12:18.755: E/AndroidRuntime(1487): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.mytheral.android.AnimationTimer/com.mytheral.android.AnimationTimer.AnimationTimerActivity}: android.view.InflateException: Binary XML file line #7: Error inflating class AnimationImageView
06-27 09:12:18.755: E/AndroidRuntime(1487):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956)
06-27 09:12:18.755: E/AndroidRuntime(1487):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
06-27 09:12:18.755: E/AndroidRuntime(1487):     at android.app.ActivityThread.access$600(ActivityThread.java:123)
06-27 09:12:18.755: E/AndroidRuntime(1487):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
06-27 09:12:18.755: E/AndroidRuntime(1487):     at android.os.Handler.dispatchMessage(Handler.java:99)
06-27 09:12:18.755: E/AndroidRuntime(1487):     at android.os.Looper.loop(Looper.java:137)
06-27 09:12:18.755: E/AndroidRuntime(1487):     at android.app.ActivityThread.main(ActivityThread.java:4424)
06-27 09:12:18.755: E/AndroidRuntime(1487):     at java.lang.reflect.Method.invokeNative(Native Method)
06-27 09:12:18.755: E/AndroidRuntime(1487):     at java.lang.reflect.Method.invoke(Method.java:511)
06-27 09:12:18.755: E/AndroidRuntime(1487):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
06-27 09:12:18.755: E/AndroidRuntime(1487):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
06-27 09:12:18.755: E/AndroidRuntime(1487):     at dalvik.system.NativeStart.main(Native Method)
06-27 09:12:18.755: E/AndroidRuntime(1487): Caused by: android.view.InflateException: Binary XML file line #7: Error inflating class AnimationImageView
06-27 09:12:18.755: E/AndroidRuntime(1487):     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:691)
06-27 09:12:18.755: E/AndroidRuntime(1487):     at android.view.LayoutInflater.rInflate(LayoutInflater.java:739)
06-27 09:12:18.755: E/AndroidRuntime(1487):     at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
06-27 09:12:18.755: E/AndroidRuntime(1487):     at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
06-27 09:12:18.755: E/AndroidRuntime(1487):     at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
06-27 09:12:18.755: E/AndroidRuntime(1487):     at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:251)
06-27 09:12:18.755: E/AndroidRuntime(1487):     at android.app.Activity.setContentView(Activity.java:1835)
06-27 09:12:18.755: E/AndroidRuntime(1487):     at com.mytheral.android.AnimationTimer.AnimationTimerActivity.onCreate(AnimationTimerActivity.java:15)
06-27 09:12:18.755: E/AndroidRuntime(1487):     at android.app.Activity.performCreate(Activity.java:4465)
06-27 09:12:18.755: E/AndroidRuntime(1487):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
06-27 09:12:18.755: E/AndroidRuntime(1487):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
06-27 09:12:18.755: E/AndroidRuntime(1487):     ... 11 more
06-27 09:12:18.755: E/AndroidRuntime(1487): Caused by: java.lang.ClassNotFoundException: android.view.AnimationImageView
06-27 09:12:18.755: E/AndroidRuntime(1487):     at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61)
06-27 09:12:18.755: E/AndroidRuntime(1487):     at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
06-27 09:12:18.755: E/AndroidRuntime(1487):     at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
06-27 09:12:18.755: E/AndroidRuntime(1487):     at android.view.LayoutInflater.createView(LayoutInflater.java:552)
06-27 09:12:18.755: E/AndroidRuntime(1487):     at android.view.LayoutInflater.onCreateView(LayoutInflater.java:636)
06-27 09:12:18.755: E/AndroidRuntime(1487):     at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:66)
06-27 09:12:18.755: E/AndroidRuntime(1487):     at android.view.LayoutInflater.onCreateView(LayoutInflater.java:653)
06-27 09:12:18.755: E/AndroidRuntime(1487):     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:678)
06-27 09:12:18.755: E/AndroidRuntime(1487):     ... 21 more

XML 文件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >
    <AnimationImageView
        android:id="@+id/progress_bar"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/ic_launcher" />
</LinearLayout>

动画定时器活动

package com.mytheral.android.AnimationTimer;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
public class AnimationTimerActivity extends Activity {
    /** Called when the activity is first created. */
    private static final String TAG = "AnimationTimer";
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Log.v(TAG, "onCreate");
        AnimationImageView image= (AnimationImageView) findViewById(R.id.progress_bar);
        image.StartAnimation();
    }
}

动画图像视图

package com.mytheral.android.AnimationTimer;
import java.util.Timer;
import java.util.TimerTask;
import android.content.Context;
import android.net.Uri;
import android.os.Handler;
import android.os.Message;
import android.util.AttributeSet;
import android.util.Log;
import android.widget.ImageView;
public class AnimationImageView extends ImageView {
    private static final String TAG = "AnimationImageView";
    private Timer imgTimer;
    private int currentFrame = 0;
    private int maxFrame = 269; //Testing Value
    private String fileName = "green_flag_"; //Testing Value
    public int getCurrentFrame() {
        return currentFrame;
    }
    public void setCurrentFrame(int currentFrame) {
        this.currentFrame = currentFrame;
    }
    public int getMaxFrame() {
        return maxFrame;
    }
    public void setMaxFrame(int maxFrame) {
        this.maxFrame = maxFrame;
    }
    public String getFileName() {
        return fileName;
    }
    public void setFileName(String fileName) {
        this.fileName = fileName;
    }
    public AnimationImageView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }
    public AnimationImageView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }
    public AnimationImageView(Context context) {
        super(context);
    }
    public void StartAnimation() {
        Log.v(TAG, "onCreate");
        currentFrame = 0;
        maxFrame = 269;
        imgTimer = new Timer();
        try {
            imgTimer.scheduleAtFixedRate(new TimerTask() {
                @Override
                public void run() {
                    imgUpdateHandler.sendEmptyMessage(0);
                }}, 0, 67);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    private Handler imgUpdateHandler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            Log.v(TAG, "imgUpdateHandler: currentFrame: " + currentFrame);
            Uri imgUri;
            if (currentFrame <= maxFrame) 
            {
                int i = currentFrame;
                imgUri = Uri.parse("android.resource://com.mytheral.android.AnimationTimer/drawable/" + fileName + String.format("%04d", i));
                //Uncomment if images don't cycle... Prior Android work around
                //image.setImageURI(null);
                try {
                    setImageURI(imgUri);
                } catch (Exception e) {
                    e.printStackTrace();
                }
                currentFrame++;
            }
            if (currentFrame > maxFrame) 
            {
                Log.v(TAG, "imgUpdateHandler: stopAnimation");
                imgTimer.cancel();
                imgTimer.purge();
            }
        }       
    };
}

Answer 1

而不是这个用法

<AnimationImageView

用

<com.mytheral.android.AnimationTimer.AnimationImageView
     android:id="@+id/progress_bar"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:src="@drawable/ic_launcher" />

或

<view class="com.mytheral.android.AnimationTimer.AnimationImageView"
         android:id="@+id/progress_bar"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/ic_launcher" /> 

/>