在自定义view中常常会出现这么一个错误

    Caused by: android.view.InflateException: Binary XML file line #12: Error inflating class lzl.edu.com.scrolldemos.view.MyImageViewat android.view.LayoutInflater.createView(LayoutInflater.java:616)at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:743)at android.view.LayoutInflater.rInflate(LayoutInflater.java:806)at android.view.LayoutInflater.inflate(LayoutInflater.java:504)at android.view.LayoutInflater.inflate(LayoutInflater.java:414)at android.view.LayoutInflater.inflate(LayoutInflater.java:365)at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:257)at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:109)at lzl.edu.com.scrolldemos.MainActivity.onCreate(MainActivity.java:11)at android.app.Activity.performCreate(Activity.java:5990)at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2278)at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)?at android.app.ActivityThread.access$800(ActivityThread.java:151)?at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)?at android.os.Handler.dispatchMessage(Handler.java:102)?at android.os.Looper.loop(Looper.java:135)?at android.app.ActivityThread.main(ActivityThread.java:5254)?at java.lang.reflect.Method.invoke(Native Method)?at java.lang.reflect.Method.invoke(Method.java:372)?at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)?at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)?Caused by: java.lang.NoSuchMethodException: <init> [class android.content.Context, interface android.util.AttributeSet]at java.lang.Class.getConstructor(Class.java:531)at java.lang.Class.getConstructor(Class.java:495)at android.view.LayoutInflater.createView(LayoutInflater.java:580)at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:743)?at android.view.LayoutInflater.rInflate(LayoutInflater.java:806)?at android.view.LayoutInflater.inflate(LayoutInflater.java:504)?at android.view.LayoutInflater.inflate(LayoutInflater.java:414)?at android.view.LayoutInflater.inflate(LayoutInflater.java:365)?at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:257)?at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:109)?at lzl.edu.com.scrolldemos.MainActivity.onCreate(MainActivity.java:11)?at android.app.Activity.performCreate(Activity.java:5990)?at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)?at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2278)?at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)?at android.app.ActivityThread.access$800(ActivityThread.java:151)?at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)?at android.os.Handler.dispatchMessage(Handler.java:102)?at android.os.Looper.loop(Looper.java:135)?at android.app.ActivityThread.main(ActivityThread.java:5254)?at java.lang.reflect.Method.invoke(Native Method)?at java.lang.reflect.Method.invoke(Method.java:372)?at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)?at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)?

这个错误是因为在自定义view中设置了

android:layout_width="wrap_content"
android:layout_height="wrap_content"

使用自定义view时，不能够设置为“wrap_content”应该设置为固定的宽度和高度。

解决方案：

1、修改布局文件

 android:layout_width="match_parent"android:layout_height="match_parent"

2、重写OnMeasure()方法，为"wrap_Content"指定一个最小的值

 //重写OnMeasure方法实现wrap_content的适配@Overrideprotected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {//必须调用这个方法，来改变view的显示大小setMeasuredDimension(measureWidth(widthMeasureSpec),measureHeight(heightMeasureSpec));}/*** UNSPECIFIED* 不指定view的显示大小，常用于自定义view中。EXACTLY精确模式，就是我们常常定义的match_parent，或者layout_width="100dp"。告诉view是一个精确的显示。AT_MOST我们定义的wrap_content，没有具体的大小。*/private int measureWidth(int measureSpc){int result ;//通过measureSpe来获取view的显示模式（这里有三种显示模式）int specMode = MeasureSpec.getMode(measureSpc);int specSize = MeasureSpec.getSize(measureSpc);Log.i("获取模式","模式："+specMode+" 尺寸："+specSize);if(specMode == MeasureSpec.EXACTLY){result = specSize;}else{result = 200;if(result == MeasureSpec.AT_MOST){result = Math.min(result,specSize);}}return result;}private int measureHeight(int measureSpc){int result ;//通过measureSpe来获取view的显示模式（这里有三种显示模式）int specMode = MeasureSpec.getMode(measureSpc);int specSize = MeasureSpec.getSize(measureSpc);Log.i("获取模式","模式："+specMode+" 尺寸："+specSize);if(specMode == MeasureSpec.EXACTLY){result = specSize;}else{result = 200;if(result == MeasureSpec.AT_MOST){result = Math.min(result,specSize);}}return result;}

通过重写OnMeasure方法就可以实现layout_content="wrap_content"了。

Caused by: android.view.InflateException: Binary XML file line #12: Error inflating class lzl.edu.c相关推荐

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Caused by: android.view.InflateException: Binary XML file line #12: Error inflating class lzl.edu.c

在自定义view中常常会出现这么一个错误

Caused by: android.view.InflateException: Binary XML file line #12: Error inflating class lzl.edu.c相关推荐

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