小编Har*_*son的帖子

我想将ImageView的图像更改为黑白图像.唯一的问题是我的代码允许用户拍照,该照片放在imageview中.我希望那张照片是黑白的.如果有人知道我怎么能做到这一点,我将不胜感激.

主要活动:

package com.example.triptych4;

import java.io.File;

import android.app.Activity;
import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.Gallery;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.Toast;

public class MainActivity extends Activity {


    // label our logs "CameraApp3"
    private static String logtag = "CameraApp3";
    // tells us which camera to take a picture from
    private static int …

我想将imageview更改为黑白,而不是drawable.这样做的原因是因为用户拍摄照片并在图像视图中显示如果你知道如何做到这一点,我很感激,谢谢.

package com.example.triptych4;

import java.io.File;

import android.app.Activity;
import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Color;
import android.graphics.ColorMatrix;
import android.graphics.ColorMatrixColorFilter;
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.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.Gallery;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.Toast;

public class MainActivity extends Activity {


    // label our logs "CameraApp3"
    private static String logtag = "CameraApp3";
    // tells us which camera to …

我收到此错误:

解析XML时出错:标记不匹配.

如果有人知道如何解决这个问题,请你告诉我我缺少的东西,谢谢.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >


    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/android" >

    <Button
        android:id="@+id/btnChangeImage"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Change Image" >

</LinearLayout>