自定義線性布局經常用到：

第一種是在擴展的LinearLayout構造函數中使用Inflater加載一個布局，并從中提取出相關的UI組件進行封裝，形成一個獨立的控件。在使用該控件時，由于它所有的子元素都是在運行時通過代碼動態創建的，所以該控件只能以一個獨立控件的形式在Layout文件中聲明，例如：

public class CustomLayout extends LinearLayout{public CustomLayout(Context context){LayoutInflater mInflater = LayoutInflater.from(context);View myView = mInflater.inflate(R.layout.receive, null);addView(myView);} } < LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="wrap_content"android:layout_height="wrap_content"androidundefinedrientation="vertical" ><LinearLayout android:layout_width="wrap_content"android:layout_height="wrap_content"androidundefinedrientation="horizontal"><TextViewandroid:layout_width="wrap_content"android:layout_height="wrap_content" /><Buttonandroid:layout_width="wrap_content"android:layout_height="wrap_content" android:id="@+id/button" /></LinearLayout><TextViewandroid:layout_width="wrap_content"android:layout_height="wrap_content" /> < /LinearLayout>
實例：

imagebtn.xml

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="horizontal" ><ImageViewandroid:id="@+id/imageView1"android:layout_width="46dp"android:layout_height="46dp"android:layout_gravity="center_vertical"android:layout_marginRight="10dp"android:src="@drawable/confirm" /><TextViewandroid:id="@+id/textView1"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_gravity="center_vertical"android:text="確定"android:textSize="25dp" /></LinearLayout> MyLinearLayout1.java

package com.hust.customlinearlayout;import android.content.Context; import android.util.AttributeSet; import android.view.LayoutInflater; import android.view.View; import android.widget.ImageView; import android.widget.LinearLayout; import android.widget.TextView;public class MyLinearLayout1 extends LinearLayout {private ImageView imageView;private TextView textView;public MyLinearLayout1(Context context){super(context);}public MyLinearLayout1(Context context, AttributeSet attrs) {super(context, attrs); LayoutInflater inflater=(LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);inflater.inflate(R.layout.imagebtn, this);imageView=(ImageView) findViewById(R.id.imageView1);textView=(TextView)findViewById(R.id.textView1); }public void setImageResource(int resId){imageView.setImageResource(resId);}public void setTextViewText(String text){textView.setText(text);} }
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="wrap_content"android:gravity="center_horizontal"android:orientation="horizontal" ><com.hust.customlinearlayout.MyLinearLayout1android:id="@+id/btn_right"android:layout_height="wrap_content" android:layout_width="wrap_content"android:layout_weight="1"/><com.hust.customlinearlayout.MyLinearLayout1android:id="@+id/btn_error"android:layout_marginLeft="5dp"android:layout_weight="1"android:layout_height="wrap_content" android:layout_width="wrap_content"/></LinearLayout> package com.hust.customlinearlayout;import android.support.v7.app.ActionBarActivity; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.Toast;public class MainActivity extends ActionBarActivity {private MyLinearLayout1 myLinearLayout1;private MyLinearLayout1 myLinearLayout2;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);myLinearLayout1=(MyLinearLayout1) findViewById(R.id.btn_right);myLinearLayout2=(MyLinearLayout1) findViewById(R.id.btn_error);myLinearLayout1.setTextViewText("確定");myLinearLayout2.setTextViewText("取消");myLinearLayout1.setImageResource(R.drawable.confirm);myLinearLayout2.setImageResource(R.drawable.cancle);myLinearLayout1.setOnClickListener(new View.OnClickListener() {public void onClick(View v) {// TODO Auto-generated method stubToast.makeText(getApplicationContext(), "點擊的正確按鈕", 1).show();}});myLinearLayout2.setOnClickListener(new View.OnClickListener() {public void onClick(View v) {// TODO Auto-generated method stubToast.makeText(getApplicationContext(), "點擊的錯誤按鈕", 1).show();}});}}

第二種方式是：這個自定義VIEW中的任何控件都不是通過XML文件來定義的，而是在JAVA代碼中通過動態生成的，然后再addView()加入到你自定義的View中，

private class SpeechView extends LinearLayout { private TextView mTitle; private TextView mDialogue; public SpeechView(Context context, String title, String words) { super(context); this.setOrientation(VERTICAL); // Here we build the child views in code. They could also have // been specified in an XML file.mTitle = new TextView(context);mTitle.setText(title); addView(mTitle, new LinearLayout.LayoutParams( LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));mDialogue = new TextView(context); mDialogue.setText(words); addView(mDialogue, new LinearLayout.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));} /** * Convenience method to set the title of a SpeechView*/ public void setTitle(String title) { mTitle.setText(title); } /*** Convenience method to set the dialogue of a SpeechView */ public void setDialogue(String words) {mDialogue.setText(words); } }

總結

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