Android ImageView Picture Transparent area does not respond to click events, irregular images transparent areas respond to click events
Last Update:2015-08-31
Source: Internet
Author: User
<span id="Label3"></p><p><p>Reprint: http://blog.csdn.net/aminfo/article/details/7872681</p></p><p><p><strong>Often in the project to use transparent images, irregular images, especially when playing games, you need to clear the image of the area of the Click event to do special Treatment.</strong></p></p><p><p><strong><strong>first, The film file transparent.png, the picture middle area and the periphery area is non-transparent, other areas are transparent:</strong></strong></p></p><p><p></p></p><p><p> </p></p><p><p><strong>second, the layout file Test.xml</strong></p></p><pre><?xml version=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">1.0</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span>encoding=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">Utf-8</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span>? ><linearlayout xmlns:android=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">http://schemas.android.com/apk/res/android</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #000000;"><span style="color: #000000;">Android:layout_width</span></span>=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">fill_parent</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #000000;"><span style="color: #000000;">Android:layout_height</span></span>=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">fill_parent</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #000000;"><span style="color: #000000;">android:orientation</span></span>=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">Vertical</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #000000;"><span style="color: #000000;">android:gravity</span></span>=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">Center</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #000000;"><span style="color: #000000;">Android:id</span></span>=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">@+id/mainlayout</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span>> <imageview android:id=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">@+id/imageview01</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #000000;"><span style="color: #000000;">Android:layout_width</span></span>=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">wrap_content</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #000000;"><span style="color: #000000;">Android:layout_height</span></span>=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">wrap_content</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #000000;"><span style="color: #000000;">android:src</span></span>=<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">@drawable/transparent</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span>/> </LinearLayout></pre><p><p><strong>three, Shang Activity,mainactivity.java</strong></p></p><pre><span style="color: #000000;">package <span style="color: #000000;">Org.shuxiang.test;import Android.app.activity;import Android.graphics.bitmap;import Android.graphics.drawable.bitmapdrawable;import Android.os.bundle;import Android.util.log;import Android.view.motionevent;import Android.view.view;import Android.view.window;import Android.view.view.onclicklistener;import Android.view.view.ontouchlistener;import android.widget.ImageView;</span></span><span style="color: #0000ff;"><span style="color: #0000ff;"></span> public</span> <span style="color: #0000ff;"><span style="color: #0000ff;">class</span></span><span style="color: #000000;"><span style="color: #000000;">Mainactivity extends activity{</span></span><span style="color: #0000ff;"><span style="color: #0000ff;">Private</span></span><span style="color: #000000;"><span style="color: #000000;">ImageView iv; </span></span><span style="color: #0000ff;"><span style="color: #0000ff;">Private</span></span><span style="color: #000000;"><span style="color: #000000;">Bitmap Bitmap; @Override</span></span><span style="color: #0000ff;"><span style="color: #0000ff;"></span> public</span> <span style="color: #0000ff;"><span style="color: #0000ff;">void</span></span><span style="color: #000000;"><span style="color: #000000;">onCreate (Bundle Savedinstancestate) {super.oncreate (savedinstancestate); Requestwindowfeature (window.feature_no_title); Setcontentview (r.layout.test); IV</span></span>=<span style="color: #000000;"><span style="color: #000000;">(ImageView) Findviewbyid (r.id.imageview01); Bitmap</span></span>=<span style="color: #000000;">( <span style="color: #000000;">(bitmapdrawable) (iv.getdrawable ())). getbitmap (); Iv.setonclicklistener (</span></span><span style="color: #0000ff;"><span style="color: #0000ff;">New</span></span><span style="color: #000000;"><span style="color: #000000;">Onclicklistener () {@Override</span></span><span style="color: #0000ff;"><span style="color: #0000ff;"></span> public</span> <span style="color: #0000ff;"><span style="color: #0000ff;">void</span></span><span style="color: #000000;"><span style="color: #000000;">OnClick (View V) {</span></span><span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">TODO auto-generated Method Stub</span></span>LOG.I (<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">Test</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span>,<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">Click</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #000000;"><span style="color: #000000;">); } }); Iv.setontouchlistener (</span></span><span style="color: #0000ff;"><span style="color: #0000ff;">New</span></span><span style="color: #000000;"><span style="color: #000000;">Ontouchlistener () {@Override</span></span><span style="color: #0000ff;"><span style="color: #0000ff;"></span> public</span><span style="color: #000000;"><span style="color: #000000;">boolean OnTouch (View arg0, motionevent arg1) {</span></span><span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">TODO auto-generated Method Stub</span></span> <span style="color: #0000ff;"><span style="color: #0000ff;">if</span></span>(bitmap.getpixel (<span style="color: #0000ff;"><span style="color: #0000ff;">int</span></span>) (arg1.getx ()), ((<span style="color: #0000ff;"><span style="color: #0000ff;">int</span></span>) Arg1.gety ()) = =<span style="color: #800080;"><span style="color: #800080;">0</span></span><span style="color: #000000;"><span style="color: #000000;">) {log.i (</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">Test</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span>,<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">Transparent Area</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #000000;"><span style="color: #000000;">); </span></span><span style="color: #0000ff;"><span style="color: #0000ff;">return</span></span> <span style="color: #0000ff;"><span style="color: #0000ff;">true</span></span>;<span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">transparent Zone returns True</span></span><span style="color: #000000;"><span style="color: #000000;"> } </span></span><span style="color: #0000ff;"><span style="color: #0000ff;">return</span></span> <span style="color: #0000ff;"><span style="color: #0000ff;">false</span></span><span style="color: #000000;"><span style="color: #000000;">; } }); }}</span></span></pre><p><p><strong>Principle Description:</strong></p></p><p><p><strong>Gets the touch event of the picture control, which in the touch event determines whether the current position is transparent, if it is transparent, by return true, The event is no longer passed to other listener events, or return false continues to be passed to other listener Events.</strong></p></p><p><p>Android ImageView Picture Transparent area does not respond to click events, irregular images transparent areas respond to click events</p></p></span>
