android 调用系统照相机和图库的方法

很长一段时间没更新了，今天回家了写一些这段时间的总结

下面这个函数用于调用时调用系统照相机拍照并返回路径的方法：

private String takephoto(int i) {
		Time time1 = new Time("GMT+8");    
        time1.setToNow();   	    //设置time1为当前的时间，避免照片名重复被覆盖掉
        String time =time1.toString();
		String status=Environment.getExternalStorageState(); 
		if(status.equals(Environment.MEDIA_MOUNTED)) 
		{ 
		try { 
		File dir=new File(Environment.getExternalStorageDirectory() + "/tonynotepic/"); 
		if(!dir.exists())
			dir.mkdirs(); 

		Intent intent=new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE); 
		File f=new File(dir, time+".jpg");//dir 文件夹路径   time.jpg是图片名字 
		Uri u=Uri.fromFile(f); 
		intent.putExtra(MediaStore.Images.Media.ORIENTATION, 0); 
		intent.putExtra(MediaStore.EXTRA_OUTPUT, u); 
		startActivityForResult(intent, i);//跳转到系统照相界面，请求码为i;
		
		} catch (ActivityNotFoundException  e) { 
		// TODO Auto-generated catch block 
		Toast.makeText(AddNoteActivity.this, "没有找到储存目录",Toast.LENGTH_LONG).show();  
		} 
		}else{ 
		Toast.makeText(AddNoteActivity.this, "没有储存卡",Toast.LENGTH_LONG).show(); 
		// TODO Auto-generated method stub
		
	}
		return time;//返回照片名

	}

@Override //在当前activity重写这个方法，当请求码为i时执行如下操作
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);


        switch(requestCode){    

switch (resultCode) { 
case Activity.RESULT_OK://照相完成点击确定 


File f=new File(Environment.getExternalStorageDirectory() 
+"/tonynotepic/"+time1+".jpg"); //time1是刚才takephoto的返回值，图片的路径，定义 ：private String time1;
			try { 
           Uri u = 
           Uri.parse(android.provider.MediaStore.Images.Media.insertImage(getContentResolver(), 
           f.getAbsolutePath(), null, null)); 
          picturePath1=Environment.getExternalStorageDirectory() 
        				+"/tonynotepic/"+time1+".jpg";  //根据time1，生成图片的完整路径；类型为String    				 
       } catch (FileNotFoundException e) { 
           // TODO Auto-generated catch block 
    e.printStackTrace(); } 
break; 
case Activity.RESULT_CANCELED:// 取消 
break; 
} 
break;}

@Override
protected void onStart() {//然后再重写onstart方法，这样从系统照相点确认返回当前activity后，图片设置为拍摄图像
// TODO Auto-generated method stub
super.onStart();
if(!picturePath1.equals("0"))
img1.setImageBitmap(getimage((picturePath1)));
}

然后是调用系统图库并设置图片的代码,调用代码如下

 Intent intent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(intent, i);

当你选择了图片后，系统执行如下代码

  @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

        switch(requestCode){
        
        case i:

        if (requestCode == i && resultCode == RESULT_OK && null != data) {
            Uri selectedImage = data.getData();
            String[] filePathColumn = { MediaStore.Images.Media.DATA };
            Cursor cursor = getContentResolver().query(selectedImage,
           filePathColumn, null, null, null);
           cursor.moveToFirst();
            int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
            picturePath1 = cursor.getString(columnIndex);//picturepath设置为选择的图片路径

cursor.close(); } break;

同样，重写onstart代码即可实现点击后设置activity的imageview为选择的图片