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▪Matrix放大、缩小跟旋转图片 Matrix放大、缩小和旋转图片
一、放大、缩小图片
private LinearLayout imageLayout;
private ImageView imageView;
private Button bt_big;
private Button bt_small;
private float scaleWidth = 1;
private float scaleHeight = 1;
priv.........
▪ 状态栏通报Notification用法 状态栏通知Notification用法
Notification的简单理解:http://blog.csdn.net/manymore13/article/details/6801471Android 状态栏通知Notification用法:http://www.pocketdigi.com/20100905/89.htmlAndroid Notification 传递参数:http://r.........
▪ gluPerspective跟gluLookAt的关系 gluPerspective和gluLookAt的关系
具体的可以请看:GL学习笔记(2) - 终于搞明白gluPerspective和gluLookAt的关系了
函数原型
gluLookAt(GLdoble eyex,GLdouble eyey,GLdouble eyez,GLdouble centerx,GLdouble centery,GLdouble cent.........
[1]Matrix放大、缩小跟旋转图片
来源: 互联网 发布时间: 2014-02-18
Matrix放大、缩小和旋转图片
一、放大、缩小图片
private LinearLayout imageLayout; private ImageView imageView; private Button bt_big; private Button bt_small; private float scaleWidth = 1; private float scaleHeight = 1; private int id = 0; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.big_small); imageLayout = (LinearLayout) findViewById(R.id.imageLayout); imageView = (ImageView) findViewById(R.id.imageView1); bt_big = (Button) findViewById(R.id.button1); bt_small = (Button) findViewById(R.id.button2); bt_big.setOnClickListener(new Button.OnClickListener() { public void onClick(View v) { big(imageView); } }); bt_small.setOnClickListener(new Button.OnClickListener() { public void onClick(View v) { small(imageView); } }); } /* 图片放大的method */ private void big(ImageView mImageView) { // ImageView对象(iv_photo)必须做如下设置后,才能获取其中的图像 mImageView.setDrawingCacheEnabled(true); // 获取ImageView中的图像 Bitmap bmp = Bitmap.createBitmap(mImageView.getDrawingCache()); // 从ImaggeView对象(iv_photo)中获取图像后,要记得调用setDrawingCacheEnabled(false) // 清空画图缓冲区 mImageView.setDrawingCacheEnabled(false); int bmpWidth = bmp.getWidth(); int bmpHeight = bmp.getHeight(); /* 设定图片放大的比例 */ double scale = 1.25; /* 计算这次要放大的比例 */ scaleWidth = (float) (scaleWidth * scale); scaleHeight = (float) (scaleHeight * scale); /* 产生reSize后的Bitmap对象 */ Matrix matrix = new Matrix(); matrix.postScale(scaleWidth, scaleHeight); Bitmap resizeBmp = Bitmap.createBitmap(bmp, 0, 0, bmpWidth, bmpHeight, matrix, true); if(id == 0){ imageLayout.removeView(mImageView); } else{ imageLayout.removeView((ImageView)findViewById(id)); } id = id + 1; ImageView imageView = new ImageView(BigAndSmall.this); imageView.setId(id); imageView.setImageBitmap(resizeBmp); imageLayout.addView(imageView); } /* 图片缩小的method */ private void small(ImageView mImageView) { // ImageView对象(iv_photo)必须做如下设置后,才能获取其中的图像 mImageView.setDrawingCacheEnabled(true); // 获取ImageView中的图像 Bitmap bmp = Bitmap.createBitmap(mImageView.getDrawingCache()); // 从ImaggeView对象(iv_photo)中获取图像后,要记得调用setDrawingCacheEnabled(false) // 清空画图缓冲区 mImageView.setDrawingCacheEnabled(false); int bmpWidth = bmp.getWidth(); int bmpHeight = bmp.getHeight(); /* 设定图片放大的比例 */ double scale = 0.8; /* 计算这次要放大的比例 */ scaleWidth = (float) (scaleWidth * scale); scaleHeight = (float) (scaleHeight * scale); /* 产生reSize后的Bitmap对象 */ Matrix matrix = new Matrix(); matrix.postScale(scaleWidth, scaleHeight); Bitmap resizeBmp = Bitmap.createBitmap(bmp, 0, 0, bmpWidth, bmpHeight, matrix, true); if(id == 0){ imageLayout.removeView(mImageView); } else{ imageLayout.removeView((ImageView)findViewById(id)); } id = id + 1; ImageView imageView = new ImageView(BigAndSmall.this); imageView.setId(id); imageView.setImageBitmap(resizeBmp); imageLayout.addView(imageView); }
big_small.xml
<?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"> <LinearLayout android:layout_width="fill_parent" android:layout_height="wrap_content" android:id="@+id/imageLayout"> <ImageView android:layout_width="wrap_content" android:src="/blog_article/@drawable/img2/index.html" android:layout_height="wrap_content" android:id="@+id/imageView1"></ImageView> </LinearLayout> <Button android:text="放大" android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button> <Button android:text="缩小" android:id="@+id/button2" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button> </LinearLayout>
二、旋转图片
private ImageView imageView; private Button bt_left; private Button bt_right; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.rotate); imageView = (ImageView) findViewById(R.id.imageView1); bt_left = (Button) findViewById(R.id.button1); bt_right = (Button) findViewById(R.id.button2); bt_left.setOnClickListener(new OnClickListener(){ public void onClick(View v) { rotate(imageView , 90); } }); bt_right.setOnClickListener(new OnClickListener(){ public void onClick(View v) { rotate(imageView , -90); } }); } public void rotate(ImageView imageView, int scaleAngle) { Bitmap bitmap = getBitmapFromImage(imageView); int widthOrig = bitmap.getWidth(); int heightOrig = bitmap.getHeight(); /* ScaleTimes=1,维持1:1的宽高比例 */ int scaleTimes = 1; int newWidth = widthOrig * scaleTimes; int newHeight = heightOrig * scaleTimes; /* 计算旋转的Matrix比例 */ float scaleWidth = ((float) newWidth) / widthOrig; float scaleHeight = ((float) newHeight) / heightOrig; Matrix matrix = new Matrix(); /* 使用Matrix.postScale设定维度 */ matrix.postScale(scaleWidth, scaleHeight); /* 使用Matrix.postRotate方法旋转Bitmap */ // matrix.postRotate(5*ScaleAngle); matrix.setRotate(5 * scaleAngle); /* 建立新的Bitmap对象 */ Bitmap resizedBitmap = Bitmap.createBitmap(bitmap, 0, 0, widthOrig, heightOrig, matrix, true); BitmapDrawable myNewBitmapDrawable = new BitmapDrawable(resizedBitmap); imageView.setImageDrawable(myNewBitmapDrawable); } public Bitmap getBitmapFromImage(ImageView mImageView) { // ImageView对象(iv_photo)必须做如下设置后,才能获取其中的图像 mImageView.setDrawingCacheEnabled(true); // 获取ImageView中的图像 Bitmap bmp = Bitmap.createBitmap(mImageView.getDrawingCache()); // 从ImaggeView对象(iv_photo)中获取图像后,要记得调用setDrawingCacheEnabled(false) // 清空画图缓冲区 mImageView.setDrawingCacheEnabled(false); return bmp; }
[2] 状态栏通报Notification用法
来源: 互联网 发布时间: 2014-02-18
状态栏通知Notification用法
Notification的简单理解:http://blog.csdn.net/manymore13/article/details/6801471
Android 状态栏通知Notification用法:http://www.pocketdigi.com/20100905/89.html
Android Notification 传递参数:http://renzhen.iteye.com/blog/1176746
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.pandy.notifi"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="10" />
<uses-permission android:name="android.permission.VIBRATE" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:name=".NotificationDemoActivity"
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>
Notification的简单理解:http://blog.csdn.net/manymore13/article/details/6801471
Android 状态栏通知Notification用法:http://www.pocketdigi.com/20100905/89.html
Android Notification 传递参数:http://renzhen.iteye.com/blog/1176746
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.pandy.notifi"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="10" />
<uses-permission android:name="android.permission.VIBRATE" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:name=".NotificationDemoActivity"
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>
<?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" > <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/hello" /> <Button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="显示Notification" /> <Button android:id="@+id/button2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="删除Notification" /> </LinearLayout>
package com.pandy.notifi; import android.app.Activity; import android.app.Notification; import android.app.NotificationManager; import android.app.PendingIntent; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.widget.Button; public class NotificationDemoActivity extends Activity { /** Called when the activity is first created. */ private Button button1, button2; NotificationManager nm; int notification_id=19172439; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); button1 = (Button) findViewById(R.id.button1); button2 = (Button) findViewById(R.id.button2); nm = (NotificationManager)getSystemService(NOTIFICATION_SERVICE); button1.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub Notification nf = new Notification(R.drawable.ic_launcher,"我就是发个通知到状态栏来显示而已.",System.currentTimeMillis()); //后面的参数分别是显示在顶部通知栏的小图标,小图标旁的文字(短暂显示,自动消失)系统当前时间(不明白这个有什么用) nf.defaults=Notification.DEFAULT_ALL; //这是设置通知是否同时播放声音或振动,声音为Notification.DEFAULT_SOUND //振动为Notification.DEFAULT_VIBRATE; //Light为Notification.DEFAULT_LIGHTS,在我的Milestone上好像没什么反应 //全部为Notification.DEFAULT_ALL //如果是振动或者全部,必须在AndroidManifest.xml加入振动权限 PendingIntent pt=PendingIntent.getActivity(NotificationDemoActivity.this, 0, new Intent(NotificationDemoActivity.this,NotificationDemoActivity.class), 0); //点击通知后的动作,这里是转回main 这个Acticity //往下拖动后,看见列表里面的内容 nf.setLatestEventInfo(NotificationDemoActivity.this,"往下拖动后的列表标题","点击查看内容",pt); nm.notify(notification_id, nf); } }); button2.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub //取消状态栏的通知 nm.cancel(notification_id); } }); } }
[3] gluPerspective跟gluLookAt的关系
来源: 互联网 发布时间: 2014-02-18
gluPerspective和gluLookAt的关系
具体的可以请看:GL学习笔记(2) - 终于搞明白gluPerspective和gluLookAt的关系了
函数原型
gluLookAt(GLdoble eyex,GLdouble eyey,GLdouble eyez,GLdouble centerx,GLdouble centery,GLdouble centerz,GLdouble upx,GLdouble upy,GLdouble upz); gluPerspective(GLdouble fovy,GLdouble aspect,GLdouble zNear,GLdouble zFar)
我的理解:
拿拍照来看:
一:gluPerspective相当于调整照相机与景物的距离
1. 如果想把物体拍全,把景物都拍进去,就要远离物体(即调整zNear的值)
二:gluLookAt相当于调整相机的焦距
1. 如果想拍全景物,就要把焦距调小,等于是减小放大倍数(即调整center与eye之间的距离)
2. 如果想拍倒立的景物,只要把相机反过来就行(即调整up的向量的方向)
总结:所以这个方法的调整是相互作用的,要结合起来调整。另外,如果想模拟人眼,那视角就要小于45度,只有这样成的像,才不会变形。
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