<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:orientation="vertical"
tools:context="chenshanshan.baway.com.mclearedittext.MainActivity"
 
>

    <Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="gallery"
android:text="獲取相簿圖片" />

    <ImageView
android:id="@+id/iv_image"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />


</LinearLayout>

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.view.View;
import android.widget.ImageView;
import android.widget.Toast;
import java.io.File;
public class MainActivity extends Activity {

private static final int PHOTO_REQUEST_CAREMA = 1;// 拍照private static final int PHOTO_REQUEST_GALLERY = 2;// 從相簿中選擇private static final int PHOTO_REQUEST_CUT = 3;// 結果private ImageView iv_image; /* 頭像名稱 */private static final String PHOTO_FILE_NAME = "temp_photo.jpg";
private File tempFile;

@Overrideprotected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

this.iv_image = (ImageView) this.findViewById(R.id.iv_image);


}

/** 從相簿獲取*/
public void gallery(View view) {

// 啟用系統圖庫，選擇一張圖片
Intent intent = new Intent(Intent.ACTION_PICK);
intent.setType("image/*");
// 開啟一個帶有返回值的Activity，請求碼為PHOTO_REQUEST_GALLERYstartActivityForResult(intent, PHOTO_REQUEST_GALLERY);

}

/** 剪下圖片*/private void crop(Uri uri) {
// 裁剪圖片意圖Intent intent = new Intent("com.android.camera.action.CROP");
intent.setDataAndType(uri, "image/*");
intent.putExtra("crop", "true");
// 裁剪框的比例，1：1intent.putExtra("aspectX", 1);
intent.putExtra("aspectY", 1);
intent.putExtra("outputX", 250);
intent.putExtra("outputY", 250);
intent.putExtra("outputFormat", "JPEG");
// 圖片格式intent.putExtra("noFaceDetection", true);
// 取消人臉識別intent.putExtra("return-data", true);
// 開啟一個帶有返回值的Activity，請求碼為PHOTO_REQUEST_CUTstartActivityForResult(intent, PHOTO_REQUEST_CUT);

}

/* * 判斷sdcard是否被掛載 */private boolean hasSdcard() {
if (Environment.getExternalStorageState().equals(
Environment.MEDIA_MOUNTED)) {
return true;
} else {
return false;
}

}


@Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == PHOTO_REQUEST_GALLERY) {
// 從相簿返回的資料if (data != null) {
// 得到圖片的全路徑Uri uri = data.getData();
crop(uri);
}
} else if (requestCode == PHOTO_REQUEST_CAREMA) {
// 從相機返回的資料if (hasSdcard()) {
crop(Uri.fromFile(tempFile));
} else {
Toast.makeText(MainActivity.this, "未找到儲存卡，無法儲存照片！", 0).show();
}
} else if (requestCode == PHOTO_REQUEST_CUT) {
// 從剪下圖片返回的資料if (data != null) {

Bitmap bitmap = data.getParcelableExtra("data");
this.iv_image.setImageBitmap(bitmap);

}

try {
// 將臨時檔案刪除tempFile.delete();
} catch (Exception e) {
e.printStackTrace();
}
}
super.onActivityResult(requestCode, resultCode, data);
}
}