網上的這類答案很多,不同的手機也會出現不同的情況,自己每次做這個功能都要掉進去很多次坑,分享給大家,也自己做一個筆記

話不多先看下效果

程式碼開始:

首先定義一個 PopupWindow

private PopupWindow pop = null;

然後在監聽裡面這麼寫:

pop = new PopupWindow(ModifiedDataActivity.this);
View view = getLayoutInflater().inflate(R.layout.item_popupwindows, null);//載入佈局
pop.setWidth(ViewGroup.LayoutParams.MATCH_PARENT
 
);   //設定PopupWindow 一些引數pop.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
pop.setBackgroundDrawable(new BitmapDrawable());
pop.setFocusable(true);
pop.setOutsideTouchable(true);
pop.setContentView(view);
pop.showAtLocation(view, Gravity.BOTTOM, 0, 0);
RelativeLayout parent = (RelativeLayout) view.findViewById(R.id.parent
 
);  //最外層佈局
Button bt1 = (Button) view.findViewById(R.id.item_popupwindows_camera);
Button bt2 = (Button) view.findViewById(R.id.item_popupwindows_Photo);
Button bt3 = (Button) view.findViewById(R.id.item_popupwindows_cancel);
parent.setOnClickListener(new View.OnClickListener() { // 設定點選最外層佈局關閉PopupWindow 
 

    @Override
public void onClick(View v) {
        pop.dismiss();
}
});
bt1.setOnClickListener(new View.OnClickListener() {
    public void onClick(View v) {//相機
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);//呼叫android自帶的照相機 
Uri photoUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
startActivityForResult(intent, 1);
pop.dismiss();
}
});
bt2.setOnClickListener(new View.OnClickListener() {
    public void onClick(View v) {//相簿
Intent i = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);//呼叫android的相簿 
startActivityForResult(i, 2);
pop.dismiss();
}
});
bt3.setOnClickListener(new View.OnClickListener() {
    public void onClick(View v) {
        pop.dismiss();
}
});

//這個方法是拍照或者選擇照片之後系統自動回撥的方法

@Override
protected void onActivityResult(int requestCode, int resultCode, final Intent data) {

    if (resultCode == Activity.RESULT_OK) {
        if (requestCode == 1) {  // 拍照
Bundle extras = data.getExtras();
Bitmap photoBit = (Bitmap) extras.get("data");
Bitmap option = BitmapOption.bitmapOption(photoBit, 5);
iv_aprove_head_portrait.setImageBitmap(option);
saveBitmap2file(option, "0001.jpg");
            final File file = new File("/sdcard/" + "0001.jpg");
Log.e("TAG", "file333333333333333   " + file.getName());
    //開始聯網上傳的操作
} else if (requestCode == 2) { // 相簿
try {
                Uri uri = data.getData();
String[] pojo = {MediaStore.Images.Media.DATA};
Cursor cursor = managedQuery(uri, pojo, null, null, null);
                if (cursor != null) {
                    ContentResolver cr = this.getContentResolver();
                    int colunm_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
String path = cursor.getString(colunm_index);
                    final File file = new File(path);
Bitmap bitmap = BitmapFactory.decodeStream(cr.openInputStream(uri));
Bitmap option = BitmapOption.bitmapOption(bitmap, 5);
iv_aprove_head_portrait.setImageBitmap(option);//設定為頭像的背景

                     //開始聯網上傳的操作
}
            } catch (Exception e) {

            }
        }
    }
}

//將圖片儲存到本地

    static boolean saveBitmap2file(Bitmap bmp, String filename) {
        Bitmap.CompressFormat format = Bitmap.CompressFormat.JPEG;
        int quality = 100;
OutputStream stream = null;
        try {
            stream = new FileOutputStream("/sdcard/" + filename);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block 
e.printStackTrace();
}

        return bmp.compress(format, quality, stream);
}

//壓縮圖片的工具類,上面有用到  

bitmapOption中的size 代表壓縮的級別

public class BitmapOption {

    private static final BitmapOption bitmapOption = new BitmapOption();
    private BitmapOption() {
    }

    public static BitmapOption getBitmapOption() {
        return bitmapOption;
}


    public static Bitmap bitmapOption(Bitmap image, int size) {
        ByteArrayOutputStream out = new ByteArrayOutputStream();
image.compress(Bitmap.CompressFormat.JPEG, 85, out);
        float zoom = (float) Math.sqrt(size * 1024 / (float) out.toByteArray().length);
Matrix matrix = new Matrix();
matrix.setScale(zoom, zoom);
Bitmap result = Bitmap.createBitmap(image, 0, 0, image.getWidth(), image.getHeight(), matrix, true);
out.reset();
result.compress(Bitmap.CompressFormat.JPEG, 85, out);
        while (out.toByteArray().length > size * 1024) {
            System.out.println(out.toByteArray().length);
matrix.setScale(0.9f, 0.9f);
result = Bitmap.createBitmap(result, 0, 0, result.getWidth(), result.getHeight(), matrix, true);
out.reset();
result.compress(Bitmap.CompressFormat.JPEG, 85, out);
}
        return result;
}


}