package zhangpgil.photo; import java.io.File; import android.support.v7.app.ActionBarActivity; import android.view.View; import android.widget.Button; import android.widget.ImageView; import android.widget.Toast; import android.content.Intent; import android.graphics.Bitmap; import android.net.Uri; import android.os.Bundle; import android.os.Environment; import android.provider.MediaStore; public class MainActivity extends ActionBarActivity { /* 头像文件 */ private static final String IMAGE_FILE_NAME = "temp_head_image.jpg"; /* 请求识别码 */ private static final int CODE_GALLERY_REQUEST = 0xa0; private static final int CODE_CAMERA_REQUEST = 0xa1; private static final int CODE_RESULT_REQUEST = 0xa2; // 裁剪后图片的宽(X)和高(Y),480 X 480的正方形。（生成bitmap貌似有时要报错？可试下把大小弄小点） private static int output_X = 480; private static int output_Y = 480; private ImageView headImage = null; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); headImage = (ImageView) findViewById(R.id.imageView); Button buttonLocal = (Button) findViewById(R.id.buttonLocal); buttonLocal.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { choseHeadImageFromGallery(); } }); Button buttonCamera = (Button) findViewById(R.id.buttonCamera); buttonCamera.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { choseHeadImageFromCameraCapture(); } }); } // 从本地相册选取图片作为头像 private void choseHeadImageFromGallery() { Intent intentFromGallery = new Intent(); // 设置文件类型 intentFromGallery.setType("image/*"); intentFromGallery.setAction(Intent.ACTION_GET_CONTENT); startActivityForResult(intentFromGallery, CODE_GALLERY_REQUEST); } // 启动手机相机拍摄照片作为头像 private void choseHeadImageFromCameraCapture() { Intent intentFromCapture = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); // 判断存储卡是否可用，存储照片文件 if (hasSdcard()) { intentFromCapture.putExtra(MediaStore.EXTRA_OUTPUT, Uri .fromFile(new File(Environment .getExternalStorageDirectory(), IMAGE_FILE_NAME))); } startActivityForResult(intentFromCapture, CODE_CAMERA_REQUEST); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent intent) { // 用户没有进行有效的设置操作，返回 if (resultCode == RESULT_CANCELED) { Toast.makeText(getApplication(), "取消", Toast.LENGTH_LONG).show(); return; } switch (requestCode) { case CODE_GALLERY_REQUEST: cropRawPhoto(intent.getData()); break; case CODE_CAMERA_REQUEST: if (hasSdcard()) { File tempFile = new File( Environment.getExternalStorageDirectory(), IMAGE_FILE_NAME); cropRawPhoto(Uri.fromFile(tempFile)); } else { Toast.makeText(getApplication(), "没有SDCard!", Toast.LENGTH_LONG) .show(); } break; case CODE_RESULT_REQUEST: if (intent != null) { setImageToHeadView(intent); } break; } super.onActivityResult(requestCode, resultCode, intent); } /** * 裁剪原始的图片 */ public void cropRawPhoto(Uri uri) { Intent intent = new Intent("com.android.camera.action.CROP"); intent.setDataAndType(uri, "image/*"); // 设置裁剪 intent.putExtra("crop", "true"); // aspectX , aspectY :宽高的比例 intent.putExtra("aspectX", 1); intent.putExtra("aspectY", 1); // outputX , outputY : 裁剪图片宽高 intent.putExtra("outputX", output_X); intent.putExtra("outputY", output_Y); intent.putExtra("return-data", true); startActivityForResult(intent, CODE_RESULT_REQUEST); } /** * 提取保存裁剪之后的图片数据，并设置头像部分的View */ private void setImageToHeadView(Intent intent) { Bundle extras = intent.getExtras(); if (extras != null) { Bitmap photo = extras.getParcelable("data"); headImage.setImageBitmap(photo); } } /** * 检查设备是否存在SDCard的工具方法 */ public static boolean hasSdcard() { String state = Environment.getExternalStorageState(); if (state.equals(Environment.MEDIA_MOUNTED)) { // 有存储的SDCard return true; } else { return false; } } }

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <ImageView android:id="@+id/imageView" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/ic_launcher" /> <Button android:id="@+id/buttonLocal" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="本地相册选取头像" /> <Button android:id="@+id/buttonCamera" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="手机拍照选取头像" /> </LinearLayout>

以上所述就是本文的全部内容了，希望大家能够喜欢。