前言
最近，右眼皮还在跳，我尝试了眼药水。哈哈有点小心慌。给你们个好建议
睡前，泡泡脚（自然边泡脚边看书啥的）。泡脚好处很多哦！我突然意识到，它能减轻压力。
安卓历程
案例，我喜欢联想。最后面我会分享今天的源代码。
图片放大及透明度
效果图
核心代码
MainActivity.java
package sedion.jeffli.action; import android.os.Bundle; import android.app.Activity; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.drawable.BitmapDrawable; import android.view.Menu; import android.view.MotionEvent; import android.view.View; import android.view.View.OnClickListener; import android.view.View.OnTouchListener; import android.widget.Button; import android.widget.ImageView; public class MainActivity extends Activity { int [] images = new int[]{ R.drawable.lijiang, R.drawable.qiao, R.drawable.shuangta, R.drawable.shui, R.drawable.xiangbi, }; //定义默认显示图片 int currentImg = 2; //定义图片初始化透明度 private int alpha = 255; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); final Button plus = (Button) findViewById(R.id.button1); final Button minus = (Button) findViewById(R.id.button2); final Button next = (Button) findViewById(R.id.button3); final ImageView image1 = (ImageView)findViewById(R.id.iamge1); final ImageView image2 = (ImageView)findViewById(R.id.iamge2); next.setOnClickListener(new OnClickListener(){ @Override public void onClick(View v) { if(currentImg >= 4){ currentImg = -1; } BitmapDrawable bitmapDrawable = (BitmapDrawable) image1.getDrawable(); //图片没回收，强制回收 if (!bitmapDrawable.getBitmap().isRecycled()) { bitmapDrawable.getBitmap().recycle(); } //改变显示图片 image1.setImageBitmap(BitmapFactory.decodeResource(getResources(), images[++currentImg])); } }); OnClickListener clickListener = new OnClickListener() { @SuppressWarnings("deprecation") @Override public void onClick(View v) { if (v == plus) { setAlpha(getAlpha() + 20); } if(getAlpha() >= 255){ setAlpha(255); } if(getAlpha() <= 0){ setAlpha(0); } image1.setAlpha(getAlpha()); } }; //保定道两个按钮 plus.setOnClickListener(clickListener); minus.setOnClickListener(clickListener); image1.setOnTouchListener(new OnTouchListener(){ @SuppressWarnings("deprecation") @Override public boolean onTouch(View v, MotionEvent event) { BitmapDrawable bitmapDrawable = (BitmapDrawable) image1.getDrawable(); //获取位图 Bitmap bitmap = bitmapDrawable.getBitmap(); //bitmap实际大小与第一个ImageView的缩放比例 double scale = bitmap.getWidth() / 320.0; //获取需要显示的图片的开始点 int x = (int) (event.getX() * scale); int y = (int) (event.getY() * scale); if (x + 120 > bitmap.getWidth()) { x = bitmap.getWidth() -120; } if (y + 120 > bitmap.getHeight()) { y = bitmap.getHeight() -120; } //图片显示指定区域 image2.setImageBitmap(Bitmap.createBitmap(bitmap, x, y, 120, 120)); image2.setAlpha(getAlpha()); return false; } }); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; } public int getAlpha() { return alpha; } public void setAlpha(int alpha) { this.alpha = alpha; } }
activity_main.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:orientation="horizontal" android:gravity="center"> <Button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_weight="1" android:text="+" /> <Button android:id="@+id/button2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_weight="1" android:text="-" /> <Button android:id="@+id/button3" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_weight="1" android:text=" next" /> </LinearLayout> <!-- 显示图片整体--> <ImageView android:id="@+id/iamge1" android:layout_width="fill_parent" android:background="#0000ff" android:layout_height="240px" android:src="@drawable/shuangta" android:scaleType="fitCenter" /> <!-- 定义显示图片局部细节--> <ImageView android:id="@+id/iamge2" android:layout_width="120dp" android:background="#0000ff" android:layout_height="120dp" android:layout_marginTop="10dp" /> </LinearLayout>
联想
用于一些特殊科学图解。或者医学院那些解剖图，血管细胞啥啥的之类，可以学习必备哦（原谅本人在医科大）
界面横竖向切换
效果图
核心代码
MainActivity.java
package sedion.jeffli.action; import android.os.Bundle; import android.app.Activity; import android.view.Menu; import android.widget.CompoundButton; import android.widget.CompoundButton.OnCheckedChangeListener; import android.widget.LinearLayout; import android.widget.ToggleButton; public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); ToggleButton toggle = (ToggleButton) findViewById(R.id.toggle); final LinearLayout test = (LinearLayout)findViewById(R.id.test); toggle.setOnCheckedChangeListener(new OnCheckedChangeListener(){ @Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { if(isChecked){ //垂直 test.setOrientation(1); }else{ //水平 test.setOrientation(0); } } }); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; } }
activity_main.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > <ToggleButton android:id="@+id/toggle" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textOff="水平分布" android:textOn="垂直分布" android:checked="true" /> <LinearLayout android:id="@+id/test" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="jeff"/> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="li"/> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="jeffli"/> </LinearLayout> </LinearLayout>
联想
这东西，以后用户喜欢哪种随意切换多么好。以后安卓用户体验可以考虑.
补言
数学美吧！
最近在看这本书，吴军大哥写的很好看。google我的目标！啦啦啦
感谢及资源共享
感谢读者！很喜欢你们给我的支持。如果支持，点个赞。
知识来源： http://www.oschina.net/android/books
上面案例资源分享：
链接：链接：http://pan.baidu.com/share/link?shareid=258699827&uk=3307409781 密码：e9pk