图像动画播放失败

Question

我使用以下代码来播放图像动画。但是单击按钮后，动画无法播放。注意：我已将旋转器.xml放在res/anim文件夹中。

动画活动.java

package com.example.animationdemo;
import android.os.Bundle;
import android.app.Activity;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.Button;
import android.widget.ImageView;
public class AnimationActivity extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_animation);
        ((Button)findViewById(R.id.button1)).setOnClickListener(new OnClickListener()    {
            @Override
            public void onClick(View arg0) {
                final ImageView myImage = (ImageView)findViewById(R.id.imageView1);
                final Animation myRotation = AnimationUtils.loadAnimation(getApplicationContext(), R.anim.rotator);
                myImage.startAnimation(myRotation);
            }
        });
    }
}

旋转器.xml ：

<rotate xmlns:android="”http://schemas.android.com/apk/res/android”">
android:duration="”4000”"
android:fromdegrees="”0”"
android:pivotx="”50%”"
android:pivoty="”50%”"
android:todegrees="”360”"
android:toyscale="”0.0”"
</rotate>

activity_animation.xml ：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".AnimationActivity" >
    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="51dp"
        android:layout_marginTop="95dp"
        android:src="@drawable/ic_launcher" />
    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_marginBottom="109dp"
        android:layout_toRightOf="@+id/imageView1"
        android:text="OK" />
</RelativeLayout>

安卓清单.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.animationdemo"
    android:versionCode="1"
    android:versionName="1.0" >
    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />
    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.animationdemo.AnimationActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
</manifest>

Answer 1

<rotate xmlns:android="”http://schemas.android.com/apk/res/android”">
android:duration="4000"
android:fromdegrees="0"
android:pivotx="50”"
android:pivoty="50%"
android:todegrees="360"
android:toyscale="0.0"
</rotate>

尝试放置此文件旋转器，xml

Answer 2

问题：

逗号格式在您的文件中造成混乱，因为您可能是从某个网页复制的

溶液：

将旋转器.xml替换为以下代码：

    <rotate xmlns:android="”http://schemas.android.com/apk/res/android”">
android:duration="4000"
android:fromdegrees="0"
android:pivotx="50%"
android:pivoty="50%"
android:todegrees="360"
android:toyscale="0.0"
</rotate>

编辑：

改变

AnimationUtils.loadAnimation(getApplicationContext(), R.anim.rotator)

自

AnimationUtils.loadAnimation(AnimationActivity.this, R.anim.rotator)