Android将View转换为图片_android 将view转成图片

权限管理

    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

布局文件

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".activity.TextActivity">
 
    <RelativeLayout
        android:layout_centerVertical="true"
        android:id="@+id/view"
        android:layout_width="match_parent"
        android:layout_height="500dp"
        android:background="#FF3600"
        >
 
        <ImageView
            android:id="@+id/imageView"
            android:layout_width="match_parent"
            android:layout_height="300dp"
            />
 
        <TextView
            android:textSize="16dp"
            android:layout_marginBottom="5dp"
            android:layout_centerHorizontal="true"
            android:layout_alignParentBottom="true"
            android:text="世间万物中,表里如一者,又有几何."
            android:textColor="#FFFFFF"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
 
    </RelativeLayout>
 
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/button"
        android:text="点击!!!"
        />
    
</RelativeLayout>

Activity文件

package com.zhongqin.zhangshuai.activity;
 
import android.Manifest;
import android.annotation.TargetApi;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.os.Message;
import android.provider.MediaStore;
import android.util.Log;
import android.view.View;
import android.widget.ImageView;
 
import com.bumptech.glide.Glide;
import com.zhongqin.zhangshuai.R;
 
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
 
public class TextActivity extends BaseActivity {
 
    private Handler handler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            String picFile = (String) msg.obj;
            String[] split = picFile.split("/");
            String fileName = split[split.length - 1];
            try {
                //图片创建
                MediaStore.Images.Media.insertImage(getApplicationContext().getContentResolver(), picFile, fileName, null);
 
                // 最后通知图库更新
                sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri.parse("file://" + picFile)));
                toastMessage("图片保存图库成功");
 
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            }
        }
    };
    private View view;
 
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_text);
 
        view = findViewById(R.id.view);
        Glide.with(this).load("https://kedou-1300812733.cos.ap-beijing.myqcloud.com/admin/2020/02/25/b51d6098accc42828f482c0c6cfe9532.png").into((ImageView)findViewById(R.id.imageView));
 
        findViewById(R.id.button).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //必须View渲染完毕处理
                view.getHandler().post(new Runnable() {
                    @Override
                    public void run() {
                        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                            checkAndRequestPermission(); //权限申请
                        } else {
                            //小于6.0，不用申请权限，直接执行
                            saveMyBitmap("aaa",createViewBitmap(view));
                        }
                    }
                });
            }
        });
    }
    
    @TargetApi(Build.VERSION_CODES.M)
    private void checkAndRequestPermission() {
        List<String> lackedPermission = new ArrayList<String>();
 
        if (!(checkSelfPermission(Manifest.permission.READ_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED)) {
            lackedPermission.add(Manifest.permission.READ_EXTERNAL_STORAGE);
        }
 
        if (!(checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED)) {
            lackedPermission.add(Manifest.permission.WRITE_EXTERNAL_STORAGE);
        }
 
        // 权限都已经有了，那么直接调用SDK
        if (lackedPermission.size() == 0) {
            saveMyBitmap("aaa",createViewBitmap(view));
        } else {
            // 请求所缺少的权限，在onRequestPermissionsResult中再看是否获得权限，如果获得权限就可以调用SDK，否则不要调用SDK。
            String[] requestPermissions = new String[lackedPermission.size()];
            lackedPermission.toArray(requestPermissions);
            requestPermissions(requestPermissions, 1024);
        }
    }
 
    private boolean hasAllPermissionsGranted(int[] grantResults) {
        for (int grantResult : grantResults) {
            if (grantResult == PackageManager.PERMISSION_DENIED) {
                return false;
            }
        }
        return true;
    }
 
 
    @Override
    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        if (requestCode == 1024 && hasAllPermissionsGranted(grantResults)) {
            saveMyBitmap("aaa",createViewBitmap(view));
        } else {
            toastMessage("缺少权限");
        }
    }
 
    public void saveMyBitmap(final String bitName, final Bitmap bitmap) {
        new Thread(new Runnable() {
            @Override
            public void run() {
                String filePath = Environment.getExternalStorageDirectory().getPath();
                File file = new File(filePath + "/DCIM/Camera/" + bitName + ".png");
                try {
                    file.createNewFile();
                    FileOutputStream fOut = null;
                    fOut = new FileOutputStream(file);
                    bitmap.compress(Bitmap.CompressFormat.PNG, 100, fOut);
                    Message msg = Message.obtain();
                    msg.obj = file.getPath();
                    handler.sendMessage(msg);
                    Log.e("TAGTAGTAG","over:"+file.getPath());
                    fOut.flush();
                    fOut.close();
                } catch (IOException e) {
                    Log.e("TAGTAGTAG","!!!:"+e.getMessage());
                    e.printStackTrace();
                }
            }
        }).start();
    }
 
    //创建BitMap
    public Bitmap createViewBitmap(View v) {
        Bitmap bitmap = Bitmap.createBitmap(v.getWidth(), v.getHeight(),  Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(bitmap);
        v.draw(canvas);
        return bitmap;
    }
 
}