android头像上传

头像的上传

现在无论大小app，用户信息中的头像信息显然是必不可少的，所以这篇博文讲解了app头像的选取。说明一下，我们进行头像的更改基本上都是在主页面的fragment里面，所以这里也是在这样的环境下进行模拟；

第一步：选取头像图片的来源

点击头像框，弹出选择头像的对话框

fragment的布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    >
    <ImageView
        android:id="@+id/iv_header"
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:src="@android:drawable/ic_menu_compass"
        />

</LinerLayout>

点击头像后调用的方法

 private void showDialog() {
        new AlertDialog.Builder(getActivity())
                .setTitle(R.string.select_image_source)
                .setNegativeButton(R.string.camera, new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {
                        dialogInterface.dismiss();
                        //照相
                       // checkPermission();
                        takephoto();
                    }


                })
                .setPositiveButton(R.string.albums, new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {
                    dialogInterface.dismiss();
                        selectPicture();
                    }

          ；
}).show();

    }

第二步，获取图片；

从上面代码可以看出，我们在对话框的点击事件中调用的两个方法：takephoto()和selectPicture()，分别代表照相获取图片和从相册中选择图片；
takephoto():照相获取图片

 private void takephoto() {
        Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        tempUri = Uri.fromFile(new File(Environment.getExternalStorageDirectory(), "image.jpg"));
        intent.putExtra(MediaStore.EXTRA_OUTPUT, tempUri);
        startActivityForResult(intent, TAKE_PICTURE);
    }

上面代码就是调用系统相机，打开相机界面，并将相机的照相图片存在指定的image.jpg里面
selectPicture：从相片中获取图片

 Intent intent = new Intent(Intent.ACTION_PICK, null);
        intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "image/*");
        ((MainActivity) getActivity()).startActivityForResult(intent, CHOOSE_PICTURE);

这样，我们便可以获取到图片资源了，

第三步 对获取到的图片资源进行剪裁

上面的代码中可以看出，我们在调用系统界面获取图片是使用的是startActivityForResult()方法，这样我们便可以在onActivityResult()方法里获取到图片资源。在文章开头时我有提到，我们是在activity的fragment里面进行的选择头像操作，因为我们是在fragment里面调用的startActivityForResult()，我们很多人就会下意思的在fragment里面调用onActivityResult()方法，但到最后会发现一直获取不到返回值，我第一次发现这个有问题时在我们别人调bug时发现的，他的头像调取是在fragment的fragment里面进行的，结果发现一直获取不到返回信息，并且他那个基本架构不常见，所以这里不说细节了，有需要的可以研究一下；
这里我们需要在主界面Activity里面调用，才能获取到返回值；

主界面的布局：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.hpl.demoapplication.MainActivity">


    <FrameLayout
        android:id="@+id/content_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"></FrameLayout>
</
elativeLayout>

主界面的代码

package com.hpl.demoapplication;

import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Parcelable;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;

import java.util.List;

public class MainActivity extends AppCompatActivity {
    private static final int TAKE_PICTURE = 0x0001;
    private static final int CHOOSE_PICTURE = 0x0002;
    private static final int CROP_SMALL_PICTURE = 0x0003;
    private static final String TAG = MainActivity.class.getSimpleName();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        getSupportFragmentManager().beginTransaction().replace(R.id.content_view, new MyFragment()).commit();
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        switch(requestCode){
            case TAKE_PICTURE:
                startPhotoZoom(MyFragment.tempUri);
                break;
            case CHOOSE_PICTURE:
                startPhotoZoom(data.getData());
                break;
            case CROP_SMALL_PICTURE:
                if (data != null) {
                    setImageToView(data); // 让刚才选择裁剪得到的图片显示在界面上
                }
                break;

        }

    }

    private void setImageToView(Intent data) {
        FragmentManager supportFragmentManager = getSupportFragmentManager();
        List<Fragment> fragments = supportFragmentManager.getFragments();
        if(fragments == null){
            return;
        }
        MyFragment fragment = (MyFragment) fragments.get(fragments.size() - 1);
        Bundle bundle = data.getExtras();
        if(bundle != null){
            Bitmap bitmap = bundle.getParcelable("data");
            fragment.iv_header.setImageBitmap(bitmap);
        }
    }

    private void startPhotoZoom(Uri uri) {
        if(uri == null){
            Log.i(TAG, "startPhotoZoom: The uri is no exist!!");
            return;
        }
        //调用系统的裁图功能
        Intent intent = new Intent("com.android.camera.action.CROP");
        intent.setDataAndType(uri,"image/*");
        // crop为true是设置在开启的intent中设置显示的view可以剪裁
        intent.putExtra("crop", true);
        //设置图片的裁剪比例
        intent.putExtra("aspectX", 1);
        intent.putExtra("aspectY", 1);
        //设置剪裁图片的宽高
        intent.putExtra("outputX", 150);
        intent.putExtra("outputY", 150);
        intent.putExtra("return-data", true);

        startActivityForResult(intent, CROP_SMALL_PICTURE);
    }
}

在onActivityResult方法里面我们可以看到，在获取到图片资源后，我们调用了startPhotoZoom方法对图片进行了剪裁，这里也是调用的系统剪裁，然后将剪裁后的图片经过startActivityForResult方法进行返回；

第四步 将剪裁后的图片显示在ImageView上面并上传；

将图片剪裁后，我们同样在onActivityResult里面获取到了剪裁后的图片数据，然后我们调用了setImageToView()方法，由于ImageView在fragment里面，我们无法直接获取控件进行布局，所以我们先获取到ImageView所在的Fragment，

 FragmentManager supportFragmentManager = getSupportFragmentManager();
        List<Fragment> fragments = supportFragmentManager.getFragments();
        if(fragments == null){
            return;
        }
        MyFragment fragment = (MyFragment) fragments.get(fragments.size()- 1;

然后将数据显示在ImageView空间上；具体头像上传的时自己把握；

第五步 android6.0权限解决

这里直接将Fragment的代码给大家，不是很周密的解决方法，自行研究，哈哈

package com.hpl.demoapplication;

import android.Manifest;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.support.annotation.Nullable;
import android.support.v4.app.ActivityCompat;
import android.support.v4.app.Fragment;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AlertDialog;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.PopupWindow;
import android.widget.Toast;

import java.io.File;

/**
 * Created by 79115 on 2016/12/2.
 */
public class MyFragment extends Fragment implements View.OnClickListener {
    private static final int TAKE_PICTURE = 0x0001;
    private static final int REQUEST_CODE_ASK_CAMERA = 100;
    private static final int CHOOSE_PICTURE = 0x0002;
    private View view;
    public static Uri tempUri;
    public ImageView iv_header;

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        view = inflater.inflate(R.layout.fragment_my, null);
        return view;
    }

    @Override
    public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        iv_header = (ImageView) view.findViewById(R.id.iv_header);
        iv_header.setOnClickListener(this);
    }

    @Override
    public void onClick(View view) {
        switch (view.getId()){
            case R.id.iv_header:
                showDialog();
                break;
        }
    }
    private void checkPermission() {
        int sdkInt = Build.VERSION.SDK_INT;
        if (Build.VERSION.SDK_INT >= 23) {
            int checkCallPhonePermission = ContextCompat.checkSelfPermission(getActivity(), Manifest.permission.CAMERA);
            if (checkCallPhonePermission != PackageManager.PERMISSION_GRANTED) {
                ActivityCompat.requestPermissions(getActivity(), new String[]{
                        Manifest.permission.CAMERA}, REQUEST_CODE_ASK_CAMERA);

            } else {
                takephoto();
            }
        } else {
            takephoto();
        }
    }
    @Override
    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
        switch (requestCode) {
            case REQUEST_CODE_ASK_CAMERA:
                if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    // Permission Granted
                    takephoto();
                } else {
                    // Permission Denied
                    Toast.makeText(getActivity(), "为获取到照相机权限", Toast.LENGTH_SHORT).show();
                }
                break;
            default:
                super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        }
    }
    private void showDialog() {
        new AlertDialog.Builder(getActivity())
                .setTitle(R.string.select_image_source)
                .setNegativeButton(R.string.camera, new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {
                        dialogInterface.dismiss();
                        //照相
                        checkPermission();
                        //takephoto();
                    }


                })
                .setPositiveButton(R.string.albums, new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {
                        dialogInterface.dismiss();
                        selectPicture();
                    }
                }).show();

    }

    private void selectPicture() {
        Intent intent = new Intent(Intent.ACTION_PICK, null);
        intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "image/*");
        ((MainActivity) getActivity()).startActivityForResult(intent, CHOOSE_PICTURE);
    }

    private void takephoto() {
        Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        tempUri = Uri.fromFile(new File(Environment.getExternalStorageDirectory(), "image.jpg"));
        intent.putExtra(MediaStore.EXTRA_OUTPUT, tempUri);
        ((MainActivity) getActivity()).startActivityForResult(intent, TAKE_PICTURE);
    }
}