自定义对话框

自定义对话框

{
                Log.d("点击头像了", "点击头像了 ");
                final AlertDialog alertDialog = new AlertDialog.Builder(MainActivity.this).create();
                alertDialog.show();
                alertDialog.setContentView(R.layout.activity_bottom_pho);
                Window window = alertDialog.getWindow();
                window.setLayout(WindowManager.LayoutParams.MATCH_PARENT, WindowManager.LayoutParams.WRAP_CONTENT);
                window.setGravity(Gravity.BOTTOM);
                **自定义对话框中的控件获取要用Window。find····，实现点击事件**
                window.findViewById(R.id.btn_cancel).setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        alertDialog.dismiss();
                    }
                });
             
     

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="200dp"
    android:background="#00000000"
    android:gravity="center_horizontal"
    android:orientation="vertical">

    <LinearLayout
        android:id="@+id/pop_layout"
        android:layout_width="fill_parent"
        android:layout_height="200dp"
        android:layout_weight="1"
        android:background="#B6B5B5"
        android:layout_alignParentBottom="true"
        android:gravity="center_horizontal"
        android:orientation="vertical">


        <Button
            android:id="@+id/btn_take_photo"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_marginLeft="20dip"
            android:layout_marginRight="20dip"
            android:layout_marginTop="20dip"
            android:background="#8e8e8e"
            android:text="拍照"
            android:textStyle="bold" />

        <Button
            android:id="@+id/btn_pick_photo"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_marginLeft="20dip"
            android:layout_marginRight="20dip"
            android:layout_marginTop="5dip"
            android:background="#8e8e8e"
            android:text="从相册选择"
            android:textStyle="bold" />

        <Button
            android:id="@+id/btn_cancel"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_marginBottom="15dip"
            android:layout_marginLeft="20dip"
            android:layout_marginRight="20dip"
            android:layout_marginTop="15dip"
            android:background="#8e8e8e"
            android:text="取消"
            android:textColor="#ffffff"
            android:textStyle="bold"

            />
    </LinearLayout>
</RelativeLayout>

 

package com.example.my;

import androidx.appcompat.app.ActionBar;
import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;
import androidx.core.content.FileProvider;

import android.Manifest;
import android.annotation.TargetApi;
import android.app.Dialog;
import android.content.ContentUris;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.provider.DocumentsContract;
import android.provider.MediaStore;
import android.util.Log;
import android.view.Gravity;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.RadioGroup;
import android.widget.Toast;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;

public class MainActivity extends AppCompatActivity {

    public static final int TAKE_PHOTO = 1;
    public static final int CHOOSE_PHOTO = 2;
    private Button mTakePhoto, mChoosePhoto;
    private ImageView picture;
    private Uri imageUri;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.youth_go);
        final ImageView btn_head = findViewById(R.id.btn_head);
        //image_head = findViewById(R.id.image_head);


        final ActionBar actionBar = getSupportActionBar();
        if (actionBar != null) {
            actionBar.hide();
        }
        btn_head.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Log.d("点击头像了", "点击头像了 ");
                final AlertDialog alertDialog = new AlertDialog.Builder(MainActivity.this).create();
                alertDialog.show();
                alertDialog.setContentView(R.layout.activity_bottom_pho);
                Window window = alertDialog.getWindow();
                window.setLayout(WindowManager.LayoutParams.MATCH_PARENT, WindowManager.LayoutParams.WRAP_CONTENT);
                window.setGravity(Gravity.BOTTOM);
                window.findViewById(R.id.btn_cancel).setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        alertDialog.dismiss();
                    }
                });
                //拍照
                window.findViewById(R.id.btn_take_photo).setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        //创建file对象，用于存储拍照后的图片；
                        File outputImage = new File(getExternalCacheDir(), "output_image.jpg");

                        try {
                            if (outputImage.exists()) {
                                outputImage.delete();
                            }
                            outputImage.createNewFile();

                        } catch (Exception e) {
                            e.printStackTrace();
                        }

                        if (Build.VERSION.SDK_INT >= 24) {
                            imageUri = FileProvider.getUriForFile(MainActivity.this,
                                    "com.example.my.fileprovider", outputImage);
                        } else {
                            imageUri = Uri.fromFile(outputImage);
                        }

                        //启动相机程序
                        Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
                        intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
                        startActivityForResult(intent, TAKE_PHOTO);
                    }
                });
                //从相册选择照片
                window.findViewById(R.id.btn_pick_photo).setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
                            ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
                        } else {
                            openAlbum();
                        }
                    }
                    //打开相册
                    private void openAlbum() {
                        Intent intent = new Intent("android.intent.action.GET_CONTENT");
                        intent.setType("image/*");
                        startActivityForResult(intent, CHOOSE_PHOTO);
                    }
                });



            }
        });


    }
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        Log.d("打开了保存照片", "onActivityResult: ");
        picture=findViewById(R.id.btn_head);
        switch (requestCode) {
            case TAKE_PHOTO:
                if (resultCode == RESULT_OK) {
                    try {
                        Bitmap bm = BitmapFactory.decodeStream(getContentResolver().openInputStream(imageUri));
                        picture.setImageBitmap(bm);
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }break;
            case CHOOSE_PHOTO :
                if (resultCode == RESULT_OK) {
                    try{
                        if (Build.VERSION.SDK_INT >= 19) {
                            handleImageOnKitKat(data);//4.4以上版本
                        }else {
                            handleImageOnKitKat(data);//4.4以下版本
                        }

                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }
                break;
            default:
                break;
        }
    }


    private String getImagePath(Uri uri, String selection) {
        String path = null;
        //通过Uri和selection来获取真实的图片路径
        Cursor cursor = getContentResolver().query(uri, null, selection, null, null);
        if (cursor != null) {
            if (cursor.moveToFirst()) {
                path = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA));
            }
            cursor.close();
        }
        return path;
    }

    private void displayImage(String imagePath) {
        if (imagePath != null) {
            Bitmap bitmap = BitmapFactory.decodeFile(imagePath);
            picture.setImageBitmap(bitmap);
        } else {
            Toast.makeText(this, "failed to get image", Toast.LENGTH_SHORT).show();
        }
    }
    @TargetApi(19)
    private void handleImageOnKitKat(Intent data) {
        String imagePath = null;
        Uri uri = data.getData();
        if (DocumentsContract.isDocumentUri(this, uri)) {
            //如果document类型的Uri,则通过document来处理
            String docID = DocumentsContract.getDocumentId(uri);
            if ("com.android.providers.media.documents".equals(uri.getAuthority())) {
                String id = docID.split(":")[1];     //解析出数字格式的id
                String selection = MediaStore.Images.Media._ID + "=" + id;

                imagePath = getImagePath(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, selection);
            } else if ("com.android.providers.downloads.documents".equals(uri.getAuthority())) {
                Uri contentUri = ContentUris.withAppendedId(Uri.parse("content://downloads/piblic_downloads"), Long.valueOf(docID));

                imagePath = getImagePath(contentUri, null);

            }

        } else if ("content".equalsIgnoreCase(uri.getScheme())) {
            //如果是content类型的uri，则使用普通方式使用
            imagePath = getImagePath(uri, null);
        } else if ("file".equalsIgnoreCase(uri.getScheme())) {
            //如果是file类型的uri，直接获取路径即可
            imagePath = uri.getPath();

        }
        displayImage(imagePath);
    }
}

//            protected void onActivityResult(int requestCode,int resultCode,Intent data){
//                        switch (requestCode){
//                            case TAKE_PHOTO:
//                                if (resultCode==RESULT_OK){
//                                    try{
//                                        //将拍摄的照片显示出来
//                                        Bitmap bitmap = BitmapFactory.decodeStream(getContentResolver().openInputStream(imageUri));
//                                        picture.setImageBitmap(bitmap);
//                                    } catch (FileNotFoundException e) {
//                                        e.printStackTrace();
//                                    }
//                                }
//                                break;
//                            default:
//                                break;
//                        }
//                }


//    public void btn_image(View v){
//        final String[] items1={"拍照","从相册中选择","取消"};
//        final AlertDialog dialog=new AlertDialog.Builder(this)
//                .setItems(items1, new DialogInterface.OnClickListener() {
//                    @Override
//                    public void onClick(DialogInterface dialog, int which) {
//                        if(items1[which].equals("拍照")){
//                            File outputImage = new File(getExternalCacheDir(),
//                                    "output_image.jpg");
//                            try {
//                                if (outputImage.exists()) {
//                                    outputImage.delete();
//                                }
//                                outputImage.createNewFile();
//                            } catch (IOException e) {
//                                e.printStackTrace();
//                            }
//                            if (Build.VERSION.SDK_INT >= 24) {
//
//                                imageUri= FileProvider.getUriForFile(MainActivity.this,
//                                        "com.example.my.fileprovider",outputImage);
//                            }else {
//                                imageUri= Uri.fromFile(outputImage);
//                            }
//                            //启动相机程序
//                            Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
//                            intent.putExtra(MediaStore.EXTRA_OUTPUT,imageUri);
//                            startActivityForResult(intent,TAKE_PHOTO);
//                        }
//
//                      //  Toast.makeText(MainActivity.this,items1[which],Toast.LENGTH_SHORT).show();
//
//                    }
//                    protected void onActivityResult(int requestCode,int resultCode,Intent data){
//                        switch (requestCode){
//                            case TAKE_PHOTO:
//                                if (resultCode==RESULT_OK){
//                                    try{
//                                        //将拍摄的照片显示出来
//                                        Bitmap bitmap = BitmapFactory.decodeStream(getContentResolver().openInputStream(imageUri));
//                                        picture.setImageBitmap(bitmap);
//                                    } catch (FileNotFoundException e) {
//                                        e.printStackTrace();
//                                    }
//                                }
//                                break;
//                            default:
//                                break;
//                        }
//                }
//        }).create();
//        dialog.show();
//    }

## 在AndroidManifest中要注册##
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />