android自定义组件实现方法

本文实例讲述了android自定义组件实现方法。分享给大家供大家参考。具体如下：
atts.xml：

<?xml version="1.0" encoding="utf-8"?><resources><declare-styleable name="TopBar"><attr name="titleText" format="string"/><attr name="titleTextSize" format="dimension"/><attr name="titleTextColor" format="color"/><attr name="leftText" format="string"/><attr name="leftBackground" format="reference|color"/><attr name="leftTextColor" format="color"/><attr name="rightText" format="string"/><attr name="rightBackground" format="reference|color"/><attr name="rightTextColor" format="color"/></declare-styleable></resources>

TopBar.java：

package com.cd.administrator.mytopbar;import android.annotation.TargetApi;import android.content.Context;import android.content.res.TypedArray;import android.graphics.drawable.Drawable;import android.os.Build;import android.util.AttributeSet;import android.view.Gravity;import android.view.View;import android.view.ViewGroup;import android.widget.Button;import android.widget.RelativeLayout;import android.widget.TextView;import android.widget.Toast;/** * Created by Administrator on 2015/1/8. */public class TopBar extends RelativeLayout{private Button leftButton,rightButton;private TextView tvTitle;private int leftTextColor;private Drawable leftBackground;private String leftText;private int rightTextColor;private Drawable rightBackground;private String rightText;private int titleTextColor;private String titleText;private float titleTextSize;private LayoutParams leftParams,rightParams,titleParams;private topBarClickListener listener;public interface topBarClickListener{public void leftClick（）;public void rightClick（）;}public void setOnTopBarClickListener（topBarClickListener listener）{this.listener = listener;}@TargetApi（Build.VERSION_CODES.JELLY_BEAN）public TopBar（final Context context, AttributeSet attrs） {super（context, attrs）;TypedArray ta = context.obtainStyledAttributes（attrs,R.styleable.TopBar）;leftTextColor = ta.getColor（R.styleable.TopBar_leftTextColor,0）;leftBackground = ta.getDrawable（R.styleable.TopBar_leftBackground）;leftText = ta.getString（R.styleable.TopBar_leftText）;rightTextColor = ta.getColor（R.styleable.TopBar_rightTextColor,0）;rightBackground = ta.getDrawable（R.styleable.TopBar_rightBackground）;rightText = ta.getString（R.styleable.TopBar_rightText）;titleTextColor = ta.getColor（R.styleable.TopBar_titleTextColor,0）;titleTextSize = ta.getDimension（R.styleable.TopBar_titleTextSize,0）;titleText = ta.getString（R.styleable.TopBar_titleText）;ta.recycle（）;leftButton = new Button（context）;rightButton = new Button（context）;tvTitle = new TextView（context）;leftButton.setTextColor（leftTextColor）;leftButton.setBackground（leftBackground）;leftButton.setText（leftText）;rightButton.setTextColor（rightTextColor）;rightButton.setBackground（rightBackground）;rightButton.setText（rightText）;tvTitle.setTextColor（titleTextColor）;tvTitle.setTextSize（titleTextSize）;tvTitle.setText（titleText）;tvTitle.setGravity（Gravity.CENTER）;setBackgroundColor（0xf59563）;leftParams = new LayoutParams（ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT）;leftParams.addRule（RelativeLayout.ALIGN_PARENT_LEFT,TRUE）;addView（leftButton,leftParams）;rightParams = new LayoutParams（ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT）;rightParams.addRule（RelativeLayout.ALIGN_PARENT_RIGHT,TRUE）;addView（rightButton,rightParams）;titleParams = new LayoutParams（ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.MATCH_PARENT）;titleParams.addRule（RelativeLayout.CENTER_IN_PARENT,TRUE）;addView（tvTitle,titleParams）;leftButton.setOnClickListener（new OnClickListener（） {@Overridepublic void onClick（View v） {listener.leftClick（）;}}）;rightButton.setOnClickListener（new OnClickListener（） {@Overridepublic void onClick（View v） {listener.rightClick（）;}}）;}}

activity_main.xml：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:custom="http://schemas.android.com/apk/res-auto"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent"android:paddingLeft="@dimen/activity_horizontal_margin"android:paddingRight="@dimen/activity_horizontal_margin"android:paddingTop="@dimen/activity_vertical_margin"android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity"><com.cd.administrator.mytopbar.TopBarandroid:id="@+id/topBar"android:layout_width="match_parent"android:layout_height="40dp"custom:leftBackground="@drawable/blue"custom:leftText="Back"custom:leftTextColor="#ffffff"custom:rightBackground="@drawable/blue"custom:rightText="More"custom:rightTextColor="#ffffff"custom:titleTextColor="#121212"custom:titleTextSize="15sp"custom:titleText="自定义标题"></com.cd.administrator.mytopbar.TopBar></RelativeLayout>

MainActivity.java：

package com.cd.administrator.mytopbar;import android.support.v7.app.ActionBarActivity;import android.os.Bundle;import android.view.Menu;import android.view.MenuItem;import android.widget.Toast;public class MainActivity extends ActionBarActivity {@Overrideprotected void onCreate（Bundle savedInstanceState） {super.onCreate（savedInstanceState）;setContentView（R.layout.activity_main）;TopBar topBar = （TopBar） findViewById（R.id.topBar）;topBar.setOnTopBarClickListener（new TopBar.topBarClickListener（） {@Overridepublic void leftClick（） {Toast.makeText（MainActivity.this, "cd--left", Toast.LENGTH_SHORT）.show（）;}@Overridepublic void rightClick（） {Toast.makeText（MainActivity.this,"cd--right",Toast.LENGTH_SHORT）.show（）;}}）;}@Overridepublic boolean onCreateOptionsMenu（Menu menu） {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater（）.inflate（R.menu.menu_main, menu）;return true;}@Overridepublic boolean onOptionsItemSelected（MenuItem item） {// Handle action bar item clicks here. The action bar will// automatically handle clicks on the Home/Up button, so long// as you specify a parent activity in AndroidManifest.xml.int id = item.getItemId（）;//noinspection SimplifiableIfStatementif （id == R.id.action_settings） {return true;}return super.onOptionsItemSelected（item）;}}

希望本文所述对大家的Android程序设计有所帮助。