mport java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.TextView;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Intent intent = getIntent();
//获得Intent的Action
String action = intent.getAction();
//获得Intent的MIME type
String type = intent.getType();
if(Intent.ACTION_SEND.equals(action) && type != null){
//我们这里处理所有的文本类型
if(type.startsWith("text/")){
//处理获取到的文本，这里我们用TextView显示
handleSendText(intent);
}
//图片的MIME type有 image/png , image/jepg, image/gif 等，
else if(type.startsWith("image/")){
//处理获取到图片，我们用ImageView显示
handleSendImage(intent);
}
}
else if(Intent.ACTION_SEND_MULTIPLE.equals(action) && type != null){
if (type.startsWith("image/")) {
//处理多张图片，我们用一个GridView来显示
handleSendMultipleImages(intent);
}
}
}
/**
* 用TextView显示文本
* 可以打开一般的文本文件
* @param intent
*/
private void handleSendText(Intent intent){
TextView textView = new TextView(this);
//一般的文本处理，我们直接显示字符串
String sharedText = intent.getStringExtra(Intent.EXTRA_TEXT);
if(sharedText != null){
textView.setText(sharedText);
}
//文本文件处理，从Uri中获取输入流，然后将输入流转换成字符串
Uri textUri = (Uri) intent.getParcelableExtra(Intent.EXTRA_STREAM);
if(textUri != null){
try {
InputStream inputStream = this.getContentResolver().openInputStream(textUri);
textView.setText(inputStream2Byte(inputStream));
} catch (Exception e) {
e.printStackTrace();
}
}
//设置给Activity
setContentView(textView);
}
/**
* 将输入流转换成字符串
* @param inputStream
* @return
* @throws IOException
*/
private String inputStream2Byte(InputStream inputStream) throws IOException{
ByteArrayOutputStream bos = new ByteArrayOutputStream();
byte [] buffer = new byte[1024];
int len = -1;
while((len = inputStream.read(buffer)) != -1){
bos.write(buffer, 0, len);
}
bos.close();
//指定编码格式为UIT-8
return new String(bos.toByteArray(), "UTF-8");
}
/**
* 用ImageView显示单张图片
* @param intent
*/
private void handleSendImage(Intent intent) {
Uri imageUri = (Uri) intent.getParcelableExtra(Intent.EXTRA_STREAM);
if (imageUri != null) {
ImageView imageView = new ImageView(this);
imageView.setImageURI(imageUri);
setContentView(imageView);
}
}
/**
* 用GridView显示多张图片
* @param intent
*/
private void handleSendMultipleImages(Intent intent) {
final ArrayList<Uri> imageUris = intent.getParcelableArrayListExtra(Intent.EXTRA_STREAM);
if (imageUris != null) {
GridView gridView = new GridView(this);
//设置item的宽度
gridView.setColumnWidth(130);
//设置列为自动适应
gridView.setNumColumns(GridView.AUTO_FIT);
gridView.setAdapter(new GridAdapter(this, imageUris));
setContentView(gridView);
gridView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
final int position, long id) {
//点击GridView的item 可以分享图片给其他应用
//这里可以参考http://blog.csdn.net/xiaanming/article/details/9395991
Intent intent = new Intent();
intent.setAction(Intent.ACTION_SEND);
intent.putExtra(Intent.EXTRA_STREAM, imageUris.get(position));
intent.setType("image/*");
startActivity(Intent.createChooser(intent, "共享图片"));
}
});
}
}
/**
* 重写BaseAdapter
* @author xiaanming
*
*/
public class GridAdapter extends BaseAdapter{
private Context mContext;
private ArrayList<Uri> list;
public GridAdapter(Context mContext, ArrayList<Uri> list){
this.list = list;
this.mContext = mContext;
}
@Override
public int getCount() {
return list.size();
}
@Override
public Object getItem(int position) {
return list.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView;
if(convertView == null){
imageView = new ImageView(mContext);
imageView.setPadding(8, 8, 8, 8);
}else{
imageView = (ImageView) convertView;
}
imageView.setImageURI(list.get(position));
return imageView;
}
}
} |
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