android 自定义textView，实现排版对齐和换行

android开发中的textview可以自动换行,但是对于显示纯英文文字来说很好用，如果夹杂了中文字符后，全角字符和半角字符混在一块儿，就会出现文字排版参差不齐，超级难看，这就需要重写textview来实现我们需要的显示方式。

下面贴上我的代码：

main.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:ae="http://www.angellecho.com/"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:background="@android:color/black"    android:gravity="center_horizontal"    android:orientation="vertical" ><ScrollView     android:layout_width="wrap_content"        android:layout_height="200dp" >    <com.wigit.MyTextView2        android:id="@+id/view"        android:layout_width="fill_parent"        android:layout_height="200dp"        android:layout_marginTop="20dp"        android:layout_marginLeft="20dp"        android:layout_marginRight="20dp"        android:background="@android:color/darker_gray"        ae:marginLeft="20"        ae:marginRight="20"        ae:paddingLeft="20"        ae:paddingRight="20"        ae:textColor="#FFFFFF"        ae:textSize="30" /></ScrollView></LinearLayout>

重写后的textview如下，可能与网上其他例子有些相似，但是还解决了drawText不能换行的问题：

package com.wigit;import android.app.Activity;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.util.AttributeSet;import android.widget.TextView;public class MyTextView2 extends TextView{private final String namespace = "http://www.angellecho.com/";private String text;private float textSize;private float paddingLeft;private float paddingRight;private float marginLeft;private float marginRight;private int textColor;private Paint paint1 = new Paint();private float textShowWidth;public MyTextView2(Context context, AttributeSet attrs) {super(context, attrs);text = attrs.getAttributeValue("http://schemas.android.com/apk/res/android", "text");textSize = attrs.getAttributeIntValue(namespace, "textSize", 15);textColor = attrs.getAttributeIntValue(namespace, "textColor",Color.WHITE);paddingLeft = attrs.getAttributeIntValue(namespace, "paddingLeft", 0);paddingRight = attrs.getAttributeIntValue(namespace, "paddingRight", 0);marginLeft = attrs.getAttributeIntValue(namespace, "marginLeft", 0);marginRight = attrs.getAttributeIntValue(namespace, "marginRight", 0);paint1.setTextSize(textSize);paint1.setColor(textColor);paint1.setAntiAlias(true);textShowWidth = ((Activity) context).getWindowManager().getDefaultDisplay().getWidth() - paddingLeft - paddingRight - marginLeft - marginRight;}@Overrideprotected void onDraw(Canvas canvas) {//super.onDraw(canvas);int lineCount = 0;text = this.getText().toString();//.replaceAll("\n", "\r\n");if(text==null)return;char[] textCharArray = text.toCharArray();// 已绘的宽度float drawedWidth = 0;float charWidth;for (int i = 0; i < textCharArray.length; i++) {charWidth = paint1.measureText(textCharArray, i, 1);if(textCharArray[i]=='\n'){lineCount++;drawedWidth = 0;continue;}if (textShowWidth - drawedWidth < charWidth) {lineCount++;drawedWidth = 0;}canvas.drawText(textCharArray, i, 1, paddingLeft + drawedWidth,(lineCount + 1) * textSize, paint1);drawedWidth += charWidth;}setHeight((lineCount + 1) * (int) textSize + 5);}}

测试activity

package com.text;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import com.wigit.MyTextView2;import android.app.Activity;import android.content.Context;import android.content.res.AssetManager;import android.os.Bundle;import android.text.method.ScrollingMovementMethod;public class MTextViewActivity extends Activity {MyTextView2 view;    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main1);                view = (MyTextView2) findViewById(R.id.view);        view.setText(getAssetsString(this,"1.txt"));        view.setMovementMethod(ScrollingMovementMethod.getInstance());    }

//读取assets文件夹下文本字符串public String getAssetsString(Context context,String fileName){StringBuffer sb = new StringBuffer();try {AssetManager am = context.getAssets();InputStream in = am.open(fileName);BufferedReader reader = new BufferedReader(new InputStreamReader(in));String line;while((line = reader.readLine())!=null){line += ("\n");sb.append(line);}reader.close();in.close();} catch (IOException e) {e.printStackTrace();}return sb.toString();}}

并附上例子如下(免积分哦)：
http://download.csdn.net/detail/dyc333236081818/4231656