Android自訂布局，android布局

Android自訂布局，android布局
1、首先建立屬性檔案

<?xml version="1.0" encoding="utf-8"?><resources>    <declare-styleable name="topbar">        <attr name="title" format="string"/>        <attr name="titleTextSize" format="dimension" />        <attr name="titleTextColor" format="color" />                <attr name="leftText" format="string"/>        <attr name="leftTextBackgroud"  format="reference|color" />        <attr name="leftTextColor" format="color" />                 <attr name="rightText" format="string"/>        <attr name="rightTextBackgroud"  format="reference|color" />        <attr name="rightTextColor" format="color" />    </declare-styleable></resources>

2、建立自訂布局類

public class TopBar extends RelativeLayout {//自訂控制項private Button leftButton ,rightButton;private TextView tvTitle;//自訂屬性private int leftTextColor;private Drawable leftBackGround;private String leftText;private int rightTextColor;private Drawable rightBackGround;private String rightText;private String titleText;private float titleTextSize;private int titleTextColor;private topBarListener tListener;public void settListener(topBarListener tListener) {this.tListener = tListener;}public interface topBarListener{public void clickLeft();public void clickRight();}private LayoutParams leftParams,rightParams,titleParams;@SuppressLint("NewApi")public TopBar(Context context, AttributeSet attrs) {super(context, attrs);// TODO Auto-generated constructor stub//擷取屬性值TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.topbar);leftTextColor = ta.getColor(R.styleable.topbar_leftTextColor, 0);leftBackGround = ta.getDrawable(R.styleable.topbar_leftTextBackgroud);leftText = ta.getString(R.styleable.topbar_leftText);rightTextColor = ta.getColor(R.styleable.topbar_rightTextColor, 0);rightBackGround = ta.getDrawable(R.styleable.topbar_rightTextBackgroud);rightText = ta.getString(R.styleable.topbar_rightText);titleText = ta.getString(R.styleable.topbar_title);titleTextSize = ta.getDimension(R.styleable.topbar_titleTextSize, 0);titleTextColor = ta.getColor(R.styleable.topbar_titleTextColor, 0);ta.recycle();//初始化控制項leftButton = new Button(context);rightButton = new Button(context);tvTitle = new TextView(context);leftButton.setText(leftText);leftButton.setBackground(leftBackGround);leftButton.setTextColor(leftTextColor);rightButton.setText(rightText);rightButton.setTextColor(rightTextColor);rightButton.setBackground(rightBackGround);tvTitle.setText(titleText);tvTitle.setTextSize(titleTextSize);tvTitle.setTextColor(titleTextColor);tvTitle.setGravity(Gravity.CENTER);setBackgroundColor(0xfff5346);leftParams = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT);leftParams.addRule(RelativeLayout.ALIGN_PARENT_LEFT,TRUE);addView(leftButton, leftParams);rightParams = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT);rightParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT,TRUE);addView(rightButton, rightParams);titleParams = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,LayoutParams.MATCH_PARENT);titleParams.addRule(RelativeLayout.CENTER_IN_PARENT,TRUE);addView(tvTitle, titleParams);leftButton.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View arg0) {// TODO Auto-generated method stubtListener.clickLeft();}});rightButton.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View arg0) {// TODO Auto-generated method stubtListener.clickRight();}});}}

3、建立監聽事件並使用

public class MainActivity extends Activity {TopBar top  ;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);top = (TopBar)findViewById(R.id.myTop);top.settListener(new topBarListener() {@Overridepublic void clickRight() {// TODO Auto-generated method stubToast.makeText(getApplicationContext(), "clicked the right Button!", 1000).show();}@Overridepublic void clickLeft() {// TODO Auto-generated method stubToast.makeText(getApplicationContext(), "clicked the left Button!", 1000).show();}});}@Overridepublic 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;}}

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"       xmlns:custom="http://schemas.android.com/apk/res/com.example.topbardemo"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    >    <com.example.topbardemo.TopBar         android:id="@+id/myTop"    android:layout_width="match_parent"    android:layout_height="40dp"    custom:leftText="left"    custom:leftTextColor="#003300"    custom:leftTextBackgroud="#00BFFF"    custom:title="title"    custom:titleTextColor="#000000"    custom:titleTextSize="14sp"    custom:rightText="right"    custom:rightTextColor="#000000"     custom:rightTextBackgroud="#00BFFF">    </com.example.topbardemo.TopBar></RelativeLayout>

幾點注意：1、在使用時需要自訂引用值，    xmlns:custom="http://schemas.android.com/apk/res/xxx"   xxx是工程包名2、使用完TypedArray需要釋放資源   ta.recycle();
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