安卓生成二维码 ==。以及中文乱码问题

参考了http://blog.csdn.net/books1958/article/details/46346531

和http://www.cnblogs.com/mythou/p/3280023.html

很多文章用的都是旧的，过时了，找了半天只有这两个是好用的 ==。

zing包是3.1, 链接如下 http://pan.baidu.com/s/1pKfkQVp
MainActivity代码如下

package com.example.wang.bmap;

import com.google.zxing.*;

import android.graphics.Bitmap;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;

import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.QRCodeWriter;

public class MainActivity extends AppCompatActivity {

private Button genButton;
private ImageView img;
private EditText input;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// ATTENTION: This was auto-generated to implement the App Indexing API.
// See https://g.co/AppIndexing/AndroidStudio for more information.
genButton = (Button)findViewById(R.id.gen);
img = (ImageView)findViewById(R.id.img);
input = (EditText)findViewById(R.id.input);
createQR();
}
public void createQR(){
genButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
String in = input.getText().toString();
try {
BitMatrix qrcode = new QRCodeWriter().encode(in, BarcodeFormat.QR_CODE, 400, 400);
int[] pixels = new int[400 * 400];

for (int y = 0; y < 400; y++) {
for (int x = 0; x < 400; x++) {
if (qrcode.get(x, y)) {
pixels[y * 400 + x] = 0xff000000;
} else {
pixels[y * 400 + x] = 0xffffffff;

}
}
}
Bitmap bitmap = Bitmap.createBitmap(400, 400, Bitmap.Config.ARGB_8888);
bitmap.setPixels(pixels, 0, 400, 0, 0, 400, 400);
img.setImageBitmap(bitmap);

} catch (WriterException e) {
e.printStackTrace();
}
}
}
);
}

/*

*/

}

　　

xml代码

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
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"
tools:context="com.example.wang.bmap.MainActivity">

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="从下边生成二维码" />

<EditText
android:id="@+id/input"
android:layout_width="match_parent"
android:layout_height="wrap_content"

android:layout_marginTop="10dp"
android:hint="请输入要生成的二维码文字" />

<Button
android:id="@+id/gen"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/input"
android:layout_marginTop="10dp"
android:text="生成二维码" />

<ImageView
android:id="@+id/img"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/gen"
android:layout_centerHorizontal="true"
android:layout_marginTop="10dp" />
</RelativeLayout>

大概是酱紫　　

乱码问题，直接google就各种答案，我采用的是

Hashtable hints = new Hashtable();
hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");

BitMatrix qrcode = new QRCodeWriter().encode(in, BarcodeFormat.QR_CODE, 400, 400,hints);

　　效果如图