declare styleableandroid自定义控件怎么用

declare styleable 时间:2022-02-27 阅读:()

android cardview 怎么用

CardView是安卓5.0的新控件，这控件其实就是一个卡片，当然我们自己也完全可以定义这样一个卡片，从现在的App中可以看到各式各样的自定义卡片，所以这个控件意义不是很大。support中的view所以使用在布局里面的时候一下子看不到效果的，比较不好。CardView继承的是FrameLayout，所以摆放内部控件的时候需要注意一下。用代码来进行参数说明： <resources> <declare-styleable name="CardView">   <attr name="cardBackgroundColor" format="color" />   <attr name="cardCornerRadius" format="dimension" />   <attr name="cardElevation" format="dimension" />   <attr name="cardMaxElevation" format="dimension" />   <attr name="cardUseCompatPadding" format="boolean" />   <attr name="cardPreventCornerOverlap" format="boolean" />   <attr name="contentPadding" format="dimension" />  <attr name="contentPaddingLeft" format="dimension" />  <attr name="contentPaddingRight" format="dimension" />  <attr name="contentPaddingTop" format="dimension" />  <attr name="contentPaddingBottom" format="dimension" /> </declare-styleable> </resources> 看完了参数，那么我们来看看布局文件中的用法。  <android.support.v7.widget.CardView xmlns:android="/apk/res/android" xmlns:tools="/tools" xmlns:app="/apk/res-auto" android:id="@+id/card_view" android:layout_width="200dp" android:layout_height="200dp" android:layout_gravity="center" app:cardCornerRadius="4dp" app:cardBackgroundColor="#ff0000" app:cardElevation="5dp" app:cardMaxElevation="10dp" app:cardUseCompatPadding="true" app:cardPreventCornerOverlap="true"> <TextView android:id="@+id/info_text" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_gravity="center" android:textSize="25sp" android:textColor="#ffffff" android:text="Hello CardView"/> </android.support.v7.widget.CardView> 以上就是详细使用说明。这样我们就定义好了一个CardView了。

android自定义控件怎么用

一、控件自定义属性介绍以下示例中代码均在values/attrs.xml 中定义，属性均可随意命名。 1. reference：参考某一资源ID。示例： <declare-styleable name = "名称"> <attr name = "background" format = "reference" /> <attr name = "src" format = "reference" /> </declare-styleable> 2. color：颜色值。示例： <declare-styleable name = "名称"> <attr name = "textColor" format = "color" /> </declare-styleable> 3. boolean：布尔值。示例： <declare-styleable name = "名称"> <attr name = "focusable" format = "boolean" /> </declare-styleable> 4. dimension：尺寸值。示例： <declare-styleable name = "名称"> <attr name = "layout_width" format = "dimension" /> </declare-styleable> 5. float：浮点值。示例： <declare-styleable name = "名称"> <attr name = "fromAlpha" format = "float" /> <attr name = "toAlpha" format = "float" /> </declare-styleable> 6. integer：整型值。示例： <declare-styleable name = "名称"> <attr name = "frameDuration" format="integer" /> <attr name = "framesCount" format="integer" /> </declare-styleable> 7. string：字符串。示例： <declare-styleable name = "名称"> <attr name = "text" format = "string" /> </declare-styleable> 8. fraction：百分数。示例： <declare-styleable name="名称"> <attr name = "pivotX" format = "fraction" /> <attr name = "pivotY" format = "fraction" /> </declare-styleable> 9. enum：枚举值。示例： <declare-styleable name="名称"> <attr name="orientation"> <enum name="horizontal" value="0" /> <enum name="vertical" value="1" /> </attr> </declare-styleable> 10. flag：位或运算。示例： <declare-styleable name="名称"> <attr name="windowSoftInputMode"> <flag name = "stateUnspecified" value = "0" /> <flag name = "stateUnchanged" value = "1" /> <flag name = "stateHidden" value = "2" /> <flag name = "stateAlwaysHidden" value = "3" /> </attr> </declare-styleable> 11.多类型。示例： <declare-styleable name = "名称"> <attr name = "background" format = "reference|color" /> </declare-styleable> 二、属性的使用以及自定义控件的实现 1、构思控件的组成元素，思考所需自定义的属性。比如：我要做一个 <带阴影的按钮，按钮正下方有文字说明>（类似9宫格按钮）新建values/attrs.xml <?xml version="1.0" encoding="utf-8"?> <resources> <declare-styleable name="custom_view"> <attr name="custom_id" format="integer" /> <attr name="src" format="reference" /> <attr name="background" format="reference" /> <attr name="text" format="string" /> <attr name="textColor" format="color" /> <attr name="textSize" format="dimension" /> </declare-styleable> </resources> 以上，所定义为custom_view，custom_id为按钮id，src为按钮，background为阴影背景，text为按钮说明，textColor为字体颜色，textSize为字体大小。 2、怎么自定义控件呢，怎么使用这些属性呢？话不多说请看代码，CustomView ： .nanlus.custom; .nanlus.custom.R; import android.content.Context; import android.content.res.TypedArray; import android.graphics.Color; import android.graphics.drawable.Drawable; import android.util.AttributeSet; import android.view.Gravity; import android.view.View; import android.view.View.OnClickListener; import android.widget.FrameLayout; import android.widget.ImageButton; import android.widget.ImageView; import android.widget.TextView; public class CustomView extends FrameLayout implements OnClickListener { private CustomListener customListener = null; private Drawable mSrc = null, mBackground = null; private String mText = ""; private int mTextColor = 0; private float mTextSize = 20; private int mCustomId = 0; private ImageView mBackgroundView = null; private ImageButton mButtonView = null; private TextView mTextView = null; private LayoutParams mParams = null; public CustomView(Context context) { super(context); } public CustomView(Context context, AttributeSet attrs) { super(context, attrs); TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.custom_view); mSrc = a.getDrawable(R.styleable.custom_view_src); mBackground = a.getDrawable(R.styleable.custom_view_background); mText = a.getString(R.styleable.custom_view_text); mTextColor = a.getColor(R.styleable.custom_view_textColor, Color.WHITE); mTextSize = a.getDimension(R.styleable.custom_view_textSize, 20); mCustomId = a.getInt(R.styleable.custom_view_custom_id, 0); mTextView = new TextView(context); mTextView.setTextSize(mTextSize); mTextView.setTextColor(mTextColor); mTextView.setText(mText); mTextView.setGravity(Gravity.CENTER); mTextView.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT)); mButtonView = new ImageButton(context); mButtonView.setImageDrawable(mSrc); mButtonView.setBackgroundDrawable(null); mButtonView.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT)); mButtonView.setOnClickListener(this); mBackgroundView = new ImageView(context); mBackgroundView.setImageDrawable(mBackground); mBackgroundView.setLayoutParams(new LayoutParams( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT)); addView(mBackgroundView); addView(mButtonView); addView(mTextView); this.setOnClickListener(this); a.recycle(); } @Override protected void onAttachedToWindow() { super.onAttachedToWindow(); mParams = (LayoutParams) mButtonView.getLayoutParams(); if (mParams != null) { mParams.gravity = Gravity.CENTER_HORIZONTAL | Gravity.TOP; mButtonView.setLayoutParams(mParams); } mParams = (LayoutParams) mBackgroundView.getLayoutParams(); if (mParams != null) { mParams.gravity = Gravity.CENTER_HORIZONTAL | Gravity.TOP; mBackgroundView.setLayoutParams(mParams); } mParams = (LayoutParams) mTextView.getLayoutParams(); if (mParams != null) { mParams.gravity = Gravity.CENTER_HORIZONTAL | Gravity.BOTTOM; mTextView.setLayoutParams(mParams); } } public void setCustomListener(CustomListener l) { customListener = l; } @Override public void onClick(View v) { if (customListener != null) { Click(v, mCustomId); } } public interface CustomListener { void Click(View v, int custom_id); } } 代码很简单，就不多说，下面来看看我们的CustomView是怎么用的，请看： 3、自定义控件的使用话不多说，请看代码，main.xml： <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="/apk/res/android" xmlns:nanlus="/apk/.nanlus.custom" android:layout_width="fill_parent" android:layout_height="fill_parent" > <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:layout_centerVertical="true" android:orientation="horizontal" > &.nanlus.custom.CustomView android:id="@+id/custom1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_weight="1" nanlus:background="@drawable/background" nanlus:custom_id="1" nanlus:src="@drawable/style_button" nanlus:text="按钮1" > <.nanlus.custom.CustomView> </LinearLayout> </RelativeLayout> 在这里需要解释一下， xmlns:nanlus="/apk/.nanlus.custom" nanlus为在xml中的前缀.nanlus.custom为包名 4、在Activity中，直接上代码 .nanlus.custom; import android.os.Bundle; import android.view.View; import android.widget.ImageButton; import android.widget.ImageView; import android.widget.TextView; import android.widget.Toast; .nanlus.BaseActivity; .nanlus.custom.R; .nanlus.custom.CustomView.CustomListener; public class CustomActivity extends BaseActivity implements CustomListener { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); ((CustomView) this.findViewById(R.id.custom1)).setCustomListener(this); } @Override public void Click(View v, int custom_id) { switch (custom_id) { case 1: Toast.makeText(this, "hello !!!", Toast.LENGTH_LONG).show(); break; default: break; } } }

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