通过拍照或选择本地图片并剪裁图片设置成头像

import java.io.File;

import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class CropActivity extends BaseActivity {
private Context context;
private Button btn_crop;
private String[] items = new String[] { "选择本地图片", "拍照" };

/*头像名称*/
private static final String IMAGE_FILE_NAME = "faceImage.jpg";

/* 请求码*/
private static final int IMAGE_REQUEST_CODE = 0;
private static final int CAMERA_REQUEST_CODE = 1;
private static final int RESULT_REQUEST_CODE = 2;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_crop);
context=this;
initViews();
}

@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
initValues();
}

@Override
protected void updateViews(Object o) {
// TODO Auto-generated method stub

}

@Override
protected void initViews() {
// TODO Auto-generated method stub

btn_crop=(Button)findViewById(R.id.btn_crop);
btn_crop.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
showDialog();
}
});

}

@Override
protected void initValues() {
// TODO Auto-generated method stub
}

@Override
protected void initHandler() {
// TODO Auto-generated method stub

}

private void showDialog() {

new AlertDialog.Builder(this)
.setTitle("设置头像")
.setItems(items, new DialogInterface.OnClickListener() {

@Override
public void onClick(DialogInterface dialog, int which) {
switch (which) {
case 0:
Intent intentFromGallery = new Intent();
intentFromGallery.setType("image/*"); // 设置文件类型
intentFromGallery.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(intentFromGallery,IMAGE_REQUEST_CODE);
break;
case 1:
Intent intentFromCapture = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
// 判断存储卡是否可以用，可用进行存储
if (hasSdcard()) {
intentFromCapture.putExtra(MediaStore.EXTRA_OUTPUT,
Uri.fromFile(new File(Environment.getExternalStorageDirectory(),IMAGE_FILE_NAME)));
}
startActivityForResult(intentFromCapture,CAMERA_REQUEST_CODE);
break;
}
}
})
.setNegativeButton("取消", new DialogInterface.OnClickListener() {

@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
}).show();

}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// 结果码不等于取消时候
if (resultCode != RESULT_CANCELED) {
switch (requestCode) {
case IMAGE_REQUEST_CODE:
startPhotoZoom(data.getData());
break;
case CAMERA_REQUEST_CODE:
if (hasSdcard()) {
File tempFile = new File(Environment.getExternalStorageDirectory(),IMAGE_FILE_NAME);
startPhotoZoom(Uri.fromFile(tempFile));
} else {
showToast("未找到存储卡，无法存储照片！");
}

break;
case RESULT_REQUEST_CODE:
if (data != null) {
setImageToView(data);
}
break;
}
}
super.onActivityResult(requestCode, resultCode, data);
}

/**
* 裁剪图片方法实现
*
* @param uri
*/
public void startPhotoZoom(Uri uri) {
if(uri==null){
Log.i("tag", "The uri is not exist.");
}
Intent intent = new Intent("com.android.camera.action.CROP");
intent.setDataAndType(uri, "image/*");
// 设置裁剪
intent.putExtra("crop", "true");
// aspectX aspectY 是宽高的比例
intent.putExtra("aspectX", 1);
intent.putExtra("aspectY", 1);
// outputX outputY 是裁剪图片宽高
intent.putExtra("outputX", 320);
intent.putExtra("outputY", 320);
intent.putExtra("return-data", true);
startActivityForResult(intent, 2);
}

/**
* 保存裁剪之后的图片数据
*
* @param picdata
*/
private void setImageToView(Intent data) {
Bundle extras = data.getExtras();
if (extras != null) {
Bitmap photo = extras.getParcelable("data");
Drawable drawable = new BitmapDrawable(photo);
btn_crop.setBackgroundDrawable(drawable);
}
}

}