本文介绍了得到抛出:IllegalArgumentException而试图使透明区域的图像按钮是不可点击的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我得到非法的异常,而试图使图像按钮不可点击的透明区域。如何解决这个问题:我已实施 OnTouchListner
和实施 loadBitmapFromView(视图V)
code是:
包com.sunojsworkshop;进口android.os.Bundle;
进口android.app.Activity;
进口android.graphics.Bitmap;
进口android.graphics.Canvas;
进口android.graphics.Color;进口android.view.MotionEvent;
进口android.view.View;进口android.view.View.OnTouchListener;进口android.widget.ImageButton;
进口android.widget.Toast;公共类MainActivity延伸活动{ @覆盖
保护无效的onCreate(捆绑savedInstanceState){
super.onCreate(savedInstanceState);
的setContentView(R.layout.activity_main);
的ImageButton imgView =(的ImageButton)findViewById(R.id.imageButton1);
imgView.setDrawingCacheEnabled(真);
imgView.setOnTouchListener(新OnTouchListener(){
//私人最终OnTouchListener changeColorListener =新OnTouchListener(){ 公共布尔onTouch(视图V,MotionEvent事件){
BMP位图= loadBitmapFromView(V);
INT颜色= bmp.getPixel((int)的event.getX(),(INT)event.getY());
如果(颜色== Color.TRANSPARENT)
返回false;
其他{
// code执行
Toast.makeText(MainActivity.this,图像按钮被点击Toast.LENGTH_SHORT).show();
返回true;
}
} 公共位图loadBitmapFromView(视图v){
// TODO自动生成方法存根 位图B = Bitmap.createBitmap(v.getLayoutParams()宽度,v.getLayoutParams()的高度,Bitmap.Config.ARGB_8888);
帆布C =新的Canvas(B);
v.layout(0,0,v.getLayoutParams()宽度,v.getLayoutParams()高度。);
v.draw(C);
返回b;
}
});
}
}
XML是:
<的RelativeLayout的xmlns:机器人=http://schemas.android.com/apk/res/android
的xmlns:工具=http://schemas.android.com/tools
机器人:layout_width =match_parent
机器人:layout_height =match_parent
机器人:paddingBottom会=@扪/ activity_vertical_margin
机器人:paddingLeft =@扪/ activity_horizontal_margin
机器人:paddingRight =@扪/ activity_horizontal_margin
机器人:paddingTop =@扪/ activity_vertical_margin
机器人:背景=@绘制/ worldfinal
工具:上下文=MainActivity。> <的TextView
机器人:ID =@ + ID / textView1
机器人:layout_width =WRAP_CONTENT
机器人:layout_height =WRAP_CONTENT
机器人:文字=选择所需的国家/> <的ImageButton
机器人:ID =@ + ID / imageButton1
机器人:layout_width =WRAP_CONTENT
机器人:layout_height =WRAP_CONTENT
机器人:layout_alignParentRight =真
机器人:layout_below =@ + ID / textView1
机器人:layout_marginRight =28dp
机器人:layout_marginTop =93dp
机器人:SRC =@绘制/ india1
机器人:背景=@机器人:彩色/透明/>
和日志是:
08-06 13:13:24.162:E / AndroidRuntime(329):致命异常:主要
08-06 13:13:24.162:E / AndroidRuntime(329):java.lang.IllegalArgumentException异常:宽度和高度必须是> 0
08-06 13:13:24.162:E / AndroidRuntime(329):在android.graphics.Bitmap.nativeCreate(本机方法)
08-06 13:13:24.162:E / AndroidRuntime(329):在android.graphics.Bitmap.createBitmap(Bitmap.java:477)
08-06 13:13:24.162:E / AndroidRuntime(329):在com.sunojsworkshop.MainActivity $ 1.loadBitmapFromView(MainActivity.java:49)
08-06 13:13:24.162:E / AndroidRuntime(329):在com.sunojsworkshop.MainActivity $ 1.onTouch(MainActivity.java:35)
08-06 13:13:24.162:E / AndroidRuntime(329):在android.view.View.dispatchTouchEvent(View.java:3881)
08-06 13:13:24.162:E / AndroidRuntime(329):在android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:869)
08-06 13:13:24.162:E / AndroidRuntime(329):在android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:869)
08-06 13:13:24.162:E / AndroidRuntime(329):在android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:869)
08-06 13:13:24.162:E / AndroidRuntime(329):在android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:869)
08-06 13:13:24.162:E / AndroidRuntime(329):在com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1691)
08-06 13:13:24.162:E / AndroidRuntime(329):在com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1125)
08-06 13:13:24.162:E / AndroidRuntime(329):在android.app.Activity.dispatchTouchEvent(Activity.java:2096)
08-06 13:13:24.162:E / AndroidRuntime(329):在com.android.internal.policy.impl.PhoneWindow $ DecorView.dispatchTouchEvent(PhoneWindow.java:1675)
08-06 13:13:24.162:E / AndroidRuntime(329):在android.view.ViewRoot.deliverPointerEvent(ViewRoot.java:2194)
08-06 13:13:24.162:E / AndroidRuntime(329):在android.view.ViewRoot.handleMessage(ViewRoot.java:1878)
08-06 13:13:24.162:E / AndroidRuntime(329):在android.os.Handler.dispatchMessage(Handler.java:99)
08-06 13:13:24.162:E / AndroidRuntime(329):在android.os.Looper.loop(Looper.java:123)
08-06 13:13:24.162:E / AndroidRuntime(329):在android.app.ActivityThread.main(ActivityThread.java:3683)
08-06 13:13:24.162:E / AndroidRuntime(329):在java.lang.reflect.Method.invokeNative(本机方法)
08-06 13:13:24.162:E / AndroidRuntime(329):在java.lang.reflect.Method.invoke(Method.java:507)
08-06 13:13:24.162:E / AndroidRuntime(329):在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:839)
08-06 13:13:24.162:E / AndroidRuntime(329):在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
08-06 13:13:24.162:E / AndroidRuntime(329):在dalvik.system.NativeStart.main(本机方法)
< / RelativeLayout的>
解决方案
v.layout(0,0,v.getLayoutParams()。width方法,v.getLayoutParams()。高) ;
在所得到的值0这里,但布局需要至少为1的值。你有没有尝试在这里提供的值不同?
I'm getting illegal exception while trying to make transparent area of an image button unclickable. How to solve this issue: I have implemented OnTouchListner
and implemented loadBitmapFromView(View v)
code is :
package com.sunojsworkshop;
import android.os.Bundle;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.widget.ImageButton;
import android.widget.Toast;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ImageButton imgView= (ImageButton) findViewById(R.id.imageButton1);
imgView.setDrawingCacheEnabled(true);
imgView.setOnTouchListener(new OnTouchListener(){
//private final OnTouchListener changeColorListener = new OnTouchListener() {
public boolean onTouch(View v, MotionEvent event) {
Bitmap bmp = loadBitmapFromView(v);
int color = bmp.getPixel((int) event.getX(),(int) event.getY());
if (color == Color.TRANSPARENT)
return false;
else {
//code to execute
Toast.makeText(MainActivity.this, "Image button is being clicked", Toast.LENGTH_SHORT).show();
return true;
}
}
public Bitmap loadBitmapFromView(View v) {
// TODO Auto-generated method stub
Bitmap b = Bitmap.createBitmap( v.getLayoutParams().width, v.getLayoutParams().height, Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(b);
v.layout(0, 0, v.getLayoutParams().width, v.getLayoutParams().height);
v.draw(c);
return b;
}
});
}
}
XML is:
<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"
android:background="@drawable/worldfinal"
tools:context=".MainActivity" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="SELECT A DESIRED COUNTRY" />
<ImageButton
android:id="@+id/imageButton1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_below="@+id/textView1"
android:layout_marginRight="28dp"
android:layout_marginTop="93dp"
android:src="@drawable/india1"
android:background="@android:color/transparent" />
and Log is:
08-06 13:13:24.162: E/AndroidRuntime(329): FATAL EXCEPTION: main
08-06 13:13:24.162: E/AndroidRuntime(329): java.lang.IllegalArgumentException: width and height must be > 0
08-06 13:13:24.162: E/AndroidRuntime(329): at android.graphics.Bitmap.nativeCreate(Native Method)
08-06 13:13:24.162: E/AndroidRuntime(329): at android.graphics.Bitmap.createBitmap(Bitmap.java:477)
08-06 13:13:24.162: E/AndroidRuntime(329): at com.sunojsworkshop.MainActivity$1.loadBitmapFromView(MainActivity.java:49)
08-06 13:13:24.162: E/AndroidRuntime(329): at com.sunojsworkshop.MainActivity$1.onTouch(MainActivity.java:35)
08-06 13:13:24.162: E/AndroidRuntime(329): at android.view.View.dispatchTouchEvent(View.java:3881)
08-06 13:13:24.162: E/AndroidRuntime(329): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:869)
08-06 13:13:24.162: E/AndroidRuntime(329): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:869)
08-06 13:13:24.162: E/AndroidRuntime(329): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:869)
08-06 13:13:24.162: E/AndroidRuntime(329): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:869)
08-06 13:13:24.162: E/AndroidRuntime(329): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1691)
08-06 13:13:24.162: E/AndroidRuntime(329): at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1125)
08-06 13:13:24.162: E/AndroidRuntime(329): at android.app.Activity.dispatchTouchEvent(Activity.java:2096)
08-06 13:13:24.162: E/AndroidRuntime(329): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1675)
08-06 13:13:24.162: E/AndroidRuntime(329): at android.view.ViewRoot.deliverPointerEvent(ViewRoot.java:2194)
08-06 13:13:24.162: E/AndroidRuntime(329): at android.view.ViewRoot.handleMessage(ViewRoot.java:1878)
08-06 13:13:24.162: E/AndroidRuntime(329): at android.os.Handler.dispatchMessage(Handler.java:99)
08-06 13:13:24.162: E/AndroidRuntime(329): at android.os.Looper.loop(Looper.java:123)
08-06 13:13:24.162: E/AndroidRuntime(329): at android.app.ActivityThread.main(ActivityThread.java:3683)
08-06 13:13:24.162: E/AndroidRuntime(329): at java.lang.reflect.Method.invokeNative(Native Method)
08-06 13:13:24.162: E/AndroidRuntime(329): at java.lang.reflect.Method.invoke(Method.java:507)
08-06 13:13:24.162: E/AndroidRuntime(329): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
08-06 13:13:24.162: E/AndroidRuntime(329): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
08-06 13:13:24.162: E/AndroidRuntime(329): at dalvik.system.NativeStart.main(Native Method)
</RelativeLayout>
解决方案
v.layout(0, 0, v.getLayoutParams().width, v.getLayoutParams().height);
you are getting the value "0" here, but the layout needs at least a value of "1". Did you try supplying different values here?
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