Android EditText图文混排

版权声明：未经本人允许，转载需要注明出处 https://blog.csdn.net/nazicsdn/article/details/81628645

关于图文混排，一些功能要求接受用户的反馈，发布等。。。。一些功能，来满足公司要求，对于一些光标的要求，图片是否插入到相对应的位置，一定要有一个清楚的认识，虽然一些工具类是别人写的，但在用的时候自己看一下了解了再用，别盲目的使用就行，接下来为大家贴出一些简单易理解的代码，希望能帮到大家。

下面是效果图：

布局我就用了一个Editext和button

<LinearLayout 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:orientation="vertical"
>

<com.example.admin.testdemo.PictureTextEditorView
    android:id="@+id/edit_text"
    android:layout_width="match_parent"
    android:layout_height="500dp"
    android:background="@null"
    android:gravity="top"
    android:hint="分享你想说的..."
    android:paddingLeft="10dp"
    android:paddingRight="10dp"
    android:includeFontPadding="false"
    android:paddingTop="10dp"
    android:lineSpacingExtra="3dp"
    android:textColor="#3a3a3a"
    android:textColorHint="#999999"
    android:textSize="14sp"
    />
    <Button
        android:id="@+id/button_add_picture"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="点我插图"
        />

</LinearLayout>

下面是一个工具类，继承了EditText

import android.annotation.SuppressLint;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.text.Editable;
import android.text.Spannable;
import android.text.SpannableString;
import android.text.style.ImageSpan;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.view.MotionEvent;
import android.widget.EditText;

import java.util.ArrayList;
import java.util.List;

@SuppressLint("AppCompatCustomView")
public class PictureTextEditorView extends EditText {
    private final String TAG = "PictureTextEditorView";
    private Context mContext;
    private List<String> mContentList;

    public static final String mBitmapTag = "☆";
    private String mNewLineTag = "\n";

    public PictureTextEditorView(Context context) {
        super(context);
        init(context);
    }

    public PictureTextEditorView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init(context);
    }

    public PictureTextEditorView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init(context);
    }

    private void init(Context context) {
        mContext = context;
        mContentList = getmContentList();
        insertData();
    }

    // 根据路径获得图片并压缩，返回bitmap用于显示
    public Bitmap getSmallBitmap(String filePath, int reqWidth, int reqHeight) {
        final BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        BitmapFactory.decodeFile(filePath, options);

        options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight);

        options.inJustDecodeBounds = false;

        Bitmap bitmap = BitmapFactory.decodeFile(filePath, options);
        DisplayMetrics dm = mContext.getResources().getDisplayMetrics();
        int w_screen = dm.widthPixels;
        int w_width = w_screen/3;
        int b_width = bitmap.getWidth();
        int b_height = bitmap.getHeight();
        int w_height = w_screen * b_height / b_width/3;
//        int w_height = w_width * b_height / b_width;
        bitmap = Bitmap.createScaledBitmap(bitmap, w_width, w_height, false);
        return bitmap;
    }

    //计算图片的缩放值
    public int calculateInSampleSize(BitmapFactory.Options options, int reqWidth, int reqHeight) {
        final int height = options.outHeight;
        final int width = options.outWidth;
        int inSampleSize = 1;

        if (height > reqHeight || width > reqWidth) {
            final int heightRatio = Math.round((float) height / (float) reqHeight);
            final int widthRatio = Math.round((float) width / (float) reqWidth);
            inSampleSize = heightRatio < widthRatio ? heightRatio : widthRatio;
        }
        return inSampleSize;
    }

    /**
     * 插入图片
     *
     * @param bitmap
     * @param path
     * @return
     */
    private SpannableString insertBitmap(String path, Bitmap bitmap) {
        Editable edit_text = getEditableText();
        int index = getSelectionStart(); // 获取光标所在位置
        //插入换行符，使图片单独占一行
        SpannableString newLine = new SpannableString("\n");
        edit_text.insert(index, newLine);//插入图片前换行
        // 创建一个SpannableString对象，以便插入用ImageSpan对象封装的图像
        path = mBitmapTag + path + mBitmapTag;
        SpannableString spannableString = new SpannableString(path);
        // 根据Bitmap对象创建ImageSpan对象
        ImageSpan imageSpan = new ImageSpan(mContext, bitmap);
        // 用ImageSpan对象替换你指定的字符串
        spannableString.setSpan(imageSpan, 0, path.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
        // 将选择的图片追加到EditText中光标所在位置
        if (index < 0 || index >= edit_text.length()) {
            edit_text.append(spannableString);
        } else {
            edit_text.insert(index, spannableString);
        }
        edit_text.insert(index, newLine);//插入图片后换行
        return spannableString;
    }


    /**
     * 设置数据
     */
    private void insertData() {
        if (mContentList.size() > 0) {
            for (String str : mContentList) {
                if (str.indexOf(mBitmapTag) != -1) {//判断是否是图片地址
                    String path = str.replace(mBitmapTag, "");//还原地址字符串
                    Bitmap bitmap = getSmallBitmap(path, 480, 800);
                    //插入图片
                    insertBitmap(path, bitmap);
                } else {
                    //插入文字
                    SpannableString ss = new SpannableString(str);
                    append(ss);
                }
            }
        }
    }


    /**
     * 用集合的形式获取控件里的内容
     *
     * @return
     */
    public List<String> getmContentList() {
        if (mContentList == null) {
            mContentList = new ArrayList<String>();
        }
        String content = getText().toString().replaceAll(mNewLineTag, "");
        if (content.length() > 0 && content.contains(mBitmapTag)) {
            String[] split = content.split("☆");
            mContentList.clear();
            for (String str : split) {
                mContentList.add(str);
            }
        } else {
            mContentList.add(content);
        }

        return mContentList;
    }


    float oldY = 0;

    @Override
    public boolean onTouchEvent(MotionEvent event) {

        switch (event.getAction()) {
            case MotionEvent.ACTION_DOWN:
                oldY = event.getY();
                requestFocus();
                break;
            case MotionEvent.ACTION_MOVE:
                float newY = event.getY();
                if (Math.abs(oldY - newY) > 20) {
                    clearFocus();
                }
                break;
            case MotionEvent.ACTION_UP:
                break;
            default:
                break;
        }
        return super.onTouchEvent(event);
    }

    /**
     * 插入图片
     *
     * @param path
     */
    public void insertBitmap(String path) {
        Bitmap bitmap = getSmallBitmap(path, 480, 800);
        insertBitmap(path, bitmap);
    }
}

在下面就是怎么实现的了，我这里只调用本地相机，你要是用手机相机拍照，把拍照的路径放里面就行了

import android.app.Activity;
import android.content.ContentUris;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.provider.DocumentsContract;
import android.provider.MediaStore;
import android.support.annotation.RequiresApi;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.view.View;
import android.widget.Button;

public class MainActivity extends Activity {

    private static final int LOCAL_IMAGE_CODE = 888;
    private PictureTextEditorView mEditText;
    private Button mButton;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mEditText = (PictureTextEditorView) findViewById(R.id.edit_text);
        mButton = (Button) findViewById(R.id.button_add_picture);


        mButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                selectPicFromLocal(MainActivity.this, 888);//获取手机本地图片的代码，大家可以自行实现
            }
        });

        mEditText.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {

            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
                Log.i("EditActivity", mEditText.getmContentList().toString());
            }

            @Override
            public void afterTextChanged(Editable editable) {

            }


        });
    }

    public void selectPicFromLocal(MainActivity mContext, int LOCAL_IMAGE_CODE) {
        // intent.setType(“image/*”); //选择图片
        // intent.setType(“audio/*”); //选择音频
        // intent.setType(“video/*”); //选择视频 （mp4 3gp 是android支持的视频格式）
        // intent.setType(“video/*;image/*”);//同时选择视频和图片
        Intent intent = new Intent();
        String IMAGE_TYPE = "image/*";
        intent.setType(IMAGE_TYPE);
        intent.setAction(Intent.ACTION_GET_CONTENT);
        startActivityForResult(intent, LOCAL_IMAGE_CODE);
    }

    //4.4之前
    public void handleImageBeforeKitKat(Intent data) {
        Uri uri = data.getData();
        String imagePath = getImagePath(uri, null);
        Log.d("Uri1", imagePath);
        mEditText.insertBitmap(imagePath);
    }

    //4.4之后
    @RequiresApi(api = Build.VERSION_CODES.KITKAT)
    public void handleImageOnKitKat(Intent data) {
        String imagePath = null;
        Uri uri = data.getData();
        if (DocumentsContract.isDocumentUri(this, uri)) {
            String docId = DocumentsContract.getDocumentId(uri);
            if ("com.android.providers.media.documents".equals(uri.getAuthority())) {
                //解析出数字格式的ID
                String id = docId.split(":")[1];
                //获取相册路径
                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://download/public_downloads"), Long.valueOf(docId));
                imagePath = getImagePath(contentUri, null);
            }
        } else if ("content".equalsIgnoreCase(uri.getScheme())) {
            imagePath = getImagePath(uri, null);
            Log.d("Uri1", imagePath);
        }
        mEditText.insertBitmap(imagePath);
    }

    private String getImagePath(Uri uri, String selection) {
        String path = null;

        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;
    }

    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (resultCode == RESULT_OK) {
            switch (requestCode) {
                case LOCAL_IMAGE_CODE:
                    if (data != null) {
                        if (resultCode == RESULT_OK) {
                            if (Build.VERSION.SDK_INT >= 19) {
                                handleImageOnKitKat(data);
                            } else {
                                handleImageBeforeKitKat(data);
                            }
                        }
                    }
                    break;
                default:
                    break;
            }
        }
    }
}

这样，一个简单的功能就实现了，如果要不理解的可以给我留言哦