Android常用控件技巧总结

 1.圆角按钮:

shape.xml:

<?xml version="1.0" encoding="UTF-8"?>
<shape
    xmlns:android="    android:layout_height="wrap_content"  
    android:background="@drawable/shape"
    />  

2.圆角输入框:

input_shape.xml:

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="                android:layout_height="wrap_content"
                android:background="@drawable/input_shape"
                android:paddingBottom="10dip"
                android:paddingLeft="50dip"
                android:paddingTop="10dip"
                android:text="请输入您的用户名"
                android:textColor="#FFFAFA" />

3.图片缩小:

<ImageView android:id="@+id/img" 
    android:src="@drawable/logo"
    android:scaleType="centerInside"
    android:layout_width="60dip"
    android:layout_height="60dip"
    android:layout_centerVertical="true"/>

4.TextView太长添加滚动条:

<ScrollView
        android:id="@+id/scrollView1"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" >
 
         <TextView
             android:id="@+id/text"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:textSize="20sp"
             android:text="TextView" />     
</ScrollView>

5.除去页面标题栏:

<activity android:name=".LoadingSystem" android:label="@string/app_name"  android:theme="@android:style/Theme.NoTitleBar"> 
            <intent-filter> 
                <action android:name="android.intent.action.MAIN"/> 
                <category android:name="android.intent.category.LAUNCHER"/>    
            </intent-filter> 
        </activity> 

6.取消EditText自动获取焦点行为:

在EditText的父级控件添加:
android:focusable="true" 
android:focusableInTouchMode="true"

7.Android控件的显示与隐藏:

setVisible(VIew.GONE);//隐藏 并且不占用界面空间
setVisible(VIew.VISIBLE);//控件显示
setVisible(VIew.INVISIBLE);//控件隐藏 占用界面空间 

8.单选框:

<RadioGroup
                    android:id="@+id/gendergroup"
                    android:layout_width="fill_parent"
                    android:layout_height="wrap_content"
                    android:orientation="vertical" >

                    <RadioButton
                        android:id="@+id/girl"
                        android:layout_width="fill_parent"
                        android:layout_height="wrap_content"
                        android:text="@string/girl" />

                    <RadioButton
                        android:id="@+id/boy"
                        android:layout_width="fill_parent"
                        android:layout_height="wrap_content"
                        android:text="@string/boy" />
                </RadioGroup>

9.让listView显示的数据靠下方显示:

android:stackFromBottom="true"

10.android设置字体颜色:

tv.setTextColor(this.getResources().getColor(R.color.textColor_black));

11.TextView过长设置显示省略号:

  android:ellipsize="end"
  android:singleLine="false"
  android:maxLines="2"

12.在代码中设置ImageView的src属性:

setImageDrawable(drawable);
setImageBitmap(bm);
setImageResource(resId);

pic1.setImageBitmap(BitmapFactory.decodeResource(getResources(),R.drawable.add_element_img));

13.Drawable与Bitmap的相互转换
//Drawable--->Bitmap
public static Bitmap drawableToBitmap(Drawable drawable) {
    return ((BitmapDrawable)drawable).getBitmap();
}
//Bitmap--->Drawable
public static Drawable bitmapToDrawable(Bitmap bitmap){
    return new BitmapDrawable(bitmap);
}

14.设置ListView数据靠下方显示:

android:stackFromBottom="true"

15.取消ListView分割线:

<ListView
        android:id="@+id/listview"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:divider="@null" >
</ListView>

16.Android 设置界面全屏显示:

<activity
            android:name="com.weijie.user.activity.OrderDetailActivity"
            android:launchMode="singleTask"
            android:configChanges="orientation|keyboardHidden"
            android:windowSoftInputMode="stateAlwaysHidden"
            android:screenOrientation="portrait"
            android:theme="@android:style/Theme.NoTitleBar.Fullscreen">
        </activity>

17.Android使用html设置TextView颜色:

this.pic_tip = (TextView) this.findViewById(R.id.pic_tip);
  String tipInfo = "(<font color='red'>*</font> 请上传本人手持身份证的近照)";
  pic_tip.setText(Html.fromHtml(tipInfo));

18.Android TextView(EditView)文字底部或者中间 加横线
tv = (TextView) this .findViewById(R.id. text_view );
中间加横线
tv.getPaint().setFlags(Paint. STRIKE_THRU_TEXT_FLAG );
底部加横线:
tv .getPaint().setFlags(Paint. UNDERLINE_TEXT_FLAG );

19.取消GridView单击时的黄色背景:

mGridView.setSelector(new ColorDrawable(Color.TRANSPARENT));

20.Android修改背景图片:

ImageView iv = new ImageView(this); iv.setBackgroundResource(R.id.bg);

21.Toast:

Toast.makeText(this, "提醒发货成功!", Toast.LENGTH_LONG).show();

22.刷新当前Activity:

Intent intent = new Intent(currentActivity.this, currentActivity.class);
startActivity(intent);
finish();//结束当前Activiy

23.Android隐藏滚动条:

android:scrollbars="none"

24.Fragment调用Activity中的方法:

((YourActivityClassName)getActivity()).yourPublicMethod();

25.在Adapter中关闭当前Activity:

((OrderCenterActivity)context).finish();

26.Android复制粘贴功能:

API 11之前: android.text.ClipboardManager
API 11之后: android.content.ClipboardManager

/**
  * 实现文本复制功能
  *
  * @param content
  */
 public static void copy(String content, Context context) {
  // 得到剪贴板管理器
  ClipboardManager cmb = (ClipboardManager) context
    .getSystemService(Context.CLIPBOARD_SERVICE);
  cmb.setText(content.trim());
 }

 /**
  * 实现粘贴功能
  *
  * @param context
  * @return
  */
 public static String paste(Context context) {
  // 得到剪贴板管理器
  ClipboardManager cmb = (ClipboardManager) context
    .getSystemService(Context.CLIPBOARD_SERVICE);
  return cmb.getText().toString().trim();
 }

27.解决Andriod软键盘出现把原来的布局给顶上去的方法
<activity
android:name=".activity.HomeActivity"
android:windowSoftInputMode="adjustPan|stateHidden" />

28.设置EditText是否可编辑:

设置不可编辑状态

editText.setFocusable(false);
editText.setFocusableInTouchMode(false);

设置可编辑状态
editText.setFocusableInTouchMode(true);
editText.setFocusable(true);
editText.requestFocus();

29.带图片的toast:

Android常用控件技巧总结//带图片的toast
 public static void showToast(Context context, String mes, int resId) {
  Toast toast = Toast.makeText(context, mes, Toast.LENGTH_SHORT);
  toast.setGravity(Gravity.CENTER, 0, 0);
  LinearLayout toastView = (LinearLayout) toast.getView();
  ImageView imageCodeProject = new ImageView(context);
  imageCodeProject.setImageResource(resId);
  toastView.addView(imageCodeProject, 0);
  toast.show();
 }

30.Android回到桌面
Intent i = new Intent(Intent.ACTION_MAIN);
  i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
  i.addCategory(Intent.CATEGORY_HOME);
  startActivity(i);

31.单击dialog之外的地方,可以dismiss掉dialog。
        setCanceledOnTouchOutside(true);
  
32.Android暂停几秒
Timer timer = new Timer(); 
         TimerTask tast = new TimerTask() { 
             @Override 
             public void run() { 
                 startActivity(localIntent); 
             } 
         }; 
         timer.schedule(tast, 1500);

33.Android实现将drawable转成bitmap:

public static Bitmap drawableToBitmap(Drawable drawable) {     
  BitmapDrawable bd = (BitmapDrawable) drawable;
  Bitmap bm = bd.getBitmap();
  return bm;
 }

34.popwindow点击外部关闭:

popView = inflater.inflate(R.layout.sort_dialog, null);              // 读取布局管理器  
popWin = new PopupWindow(popView, LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT, 
                 true); 

 popWin.setFocusable(true);
 popWin.setBackgroundDrawable(new PaintDrawable());
 popWin.setOutsideTouchable(true);

35.设置popwindow的显示位置:

popWin.showAsDropDown(findView(R.id.btn_sort),10,10);
  //popWin.showAtLocation(findView(R.id.btn_sort), Gravity.TOP|Gravity.RIGHT, 10, 100);

36.TextView单击短暂改变背景色:

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="

相关推荐