android - 我想将图像从一项活动转移到另一项活动

Question

我必须将图像从一项活动转移到另一项活动。在第一个活动中，用户从滚动视图的几个图像中选择图像，并且该图像必须显示在下一个活动的图像视图中。需要帮助。

Answer 1

在您的第一个活动中

将 ImageView 转换为位图

    imageView.buildDrawingCache();
    Bitmap bitmap = imageView.getDrawingCache();

    Intent intent = new Intent(this, NewActivity.class);
    intent.putExtra("BitmapImage", bitmap);

在第二个活动中

     Bitmap bitmap = (Bitmap) intent.getParcelableExtra("BitmapImage");

然后在 ImageView 中显示位图。

注意：不建议这样做。实际上应该将图像保存在某处并传递路径并从第二个活动中检索。

Answer 2

您可以将其作为字节数组传递并构建位图以在下一个活动中显示。例如：

在您的第一个活动中：

Intent i = new Intent(this, NextActivity.class);
Bitmap b; // your bitmap
ByteArrayOutputStream bs = new ByteArrayOutputStream();
b.compress(Bitmap.CompressFormat.PNG, 50, bs);
i.putExtra("byteArray", bs.toByteArray());
startActivity(i);

在你的第二个活动中

if(getIntent().hasExtra("byteArray")) {
    ImageView previewThumbnail = new ImageView(this);
    Bitmap b = BitmapFactory.decodeByteArray(
        getIntent().getByteArrayExtra("byteArray"),0,getIntent().getByteArrayExtra("byteArray").length);        
    previewThumbnail.setImageBitmap(b);
}

Answer 3

您可以通过多种方式做到这一点。简单是有目的的。但它可能会挂起您的设备，并且在 Galaxy S3 等许多设备中也会出现内存不足异常。

所以我会给你一个非常简单的方法，见下文。

static您可以在一个类中创建变量，例如：

public class ABC{

public static Bitmap PHOTO = null;

}

现在，当您从图库或任何其他方式获取位图时，您必须将位图保存在此 PHOTO 变量中。（这仅在 onActivityResult 中可行，对吗？）

如果您从相机中获取照片，那么代码就是。

Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(intent, CAMERA_PIC_REQUEST);

和，

@Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (resultCode == Activity.RESULT_OK) {

            switch (requestCode) {
                case CAMERA_PIC_REQUEST:
                    Bitmap b = (Bitmap) data.getExtras().get("data");
                    if (b != null) {
                        ABC.PHOTO = b;
                    }
                    break;
}
}

并在任何其他活动中使用此 PHOTO 变量。

从图库中挑选照片时，您可以使用相同的方式。

---

嗨，这是编辑过的。

这只是网格视图的示例。在这里，您了解如何将图像从一项活动传递到另一项活动。

这是您的主要活动课程：

package com.GridViewDemo;

import java.io.InputStream;
import java.net.URL;
import java.util.GregorianCalendar;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;

public class GridViewDemoActivity extends Activity {
    /** Called when the activity is first created. */

    // String[] mArr =
    // {"A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z"};
    String[] mArr = {
            "http://www.xda-developers.com/wp-content/uploads/2012/10/androidfigure.jpg?f39ce1",
            "http://1.bp.blogspot.com/-Ramp-o0Cp8s/T0VafXkE4uI/AAAAAAAAAQU/i703zg5MBgI/s1600/android-wallpaper5_1024x768.jpg",
            "http://www.thebiblescholar.com/android_awesome.jpg",
            "http://blogs-images.forbes.com/rogerkay/files/2011/07/Android1.jpg" };

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        GridView gridView = (GridView) findViewById(R.id.gridView1);
        gridView.setAdapter(new ImageAdapter(this));

        gridView.setOnItemClickListener(new OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
                    long arg3) {
                // TODO Auto-generated method stub

                /** if you have bitmap here then you can use this way
                 * Bitmap bitmap = getBitmap();
                 * test.PHOTO = bitmap; 
                 * 
                 * */
                Intent i = new Intent(GridViewDemoActivity.this, newActiivty.class);
                i.putExtra("Image_Path", ""+mArr[arg2]);
                startActivity(i);
            }
        });
    }

    public class ImageAdapter extends BaseAdapter {

        private Context mContext;

        public ImageAdapter(Context c) {
            mContext = c;
        }

        @Override
        public int getCount() {
            // TODO Auto-generated method stub
            return mArr.length;
        }

        @Override
        public Object getItem(int arg0) {
            // TODO Auto-generated method stub
            return null;
        }

        @Override
        public long getItemId(int position) {
            // TODO Auto-generated method stub
            return 0;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            // TODO Auto-generated method stub
            ImageView imgView;
            if (convertView == null) {
                imgView = new ImageView(mContext);
                imgView.setLayoutParams(new GridView.LayoutParams(85, 85));
                imgView.setScaleType(ImageView.ScaleType.CENTER_CROP);
                imgView.setPadding(8, 8, 8, 8);
            } else {
                imgView = (ImageView) convertView;
            }

            Drawable d = LoadImageFromWebOperations(mArr[position]);
            if (d == null) {
                imgView.setImageResource(R.drawable.icon);
            } else {
                imgView.setImageDrawable(d);
            }
            return imgView;
        }

    }

    public static Drawable LoadImageFromWebOperations(String url) {
        try {
            InputStream is = (InputStream) new URL(url).getContent();
            Drawable d = Drawable.createFromStream(is, "src name");
            return d;
        } catch (Exception e) {
            return null;
        }
    }
}

主要的.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <GridView android:id="@+id/gridView1" android:layout_height="wrap_content"
        android:layout_width="fill_parent" android:numColumns="4"></GridView>
</LinearLayout>

newActivity.class

package com.GridViewDemo;

import java.io.InputStream;
import java.net.URL;

import android.app.Activity;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.widget.ImageView;

public class newActiivty extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.new_layout);

        String image_path = getIntent().getStringExtra("Image_Path");

        ImageView imageview = (ImageView) findViewById(R.id.imageView1);

        Drawable d = LoadImageFromWebOperations(image_path);
        if (d != null) {
            imageview.setImageDrawable(d);
        } else {
            imageview.setImageResource(R.drawable.icon);
        }



        /** if you have bitmap then
         * imageview.setImageBitmap(test.PHOTO);
         * */
    }

    public static Drawable LoadImageFromWebOperations(String url) {
        try {
            InputStream is = (InputStream) new URL(url).getContent();
            Drawable d = Drawable.createFromStream(is, "src name");
            return d;
        } catch (Exception e) {
            return null;
        }
    }

}

new_layout.xml

<?xml version="1.0" encoding="UTF-8"?>
<LinearLayout android:id="@+id/linearLayout1"
    android:layout_width="fill_parent" android:layout_height="fill_parent"
    xmlns:android="http://schemas.android.com/apk/res/android">
    <ImageView android:src="@drawable/icon" android:id="@+id/imageView1"
        android:layout_width="fill_parent" android:layout_height="320dp"></ImageView>
</LinearLayout>

清单文件

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.GridViewDemo"
      android:versionCode="1"
      android:versionName="1.0">
    <uses-sdk android:minSdkVersion="3" />
    <uses-permission android:name="android.permission.INTERNET"></uses-permission>

    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".GridViewDemoActivity"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name=".newActiivty"></activity>

    </application>
</manifest>

这是额外的类：如果你有位图，那么使用这种方式：

package com.GridViewDemo;

import android.graphics.Bitmap;

public class test {

    public static Bitmap PHOTO = null;

}

我在代码中评论所以，检查它，如果你有查询，然后在这个答案下面评论。

Answer 4

在第一个活动中首先确保你在顶部实例化位图，如位图位图；

然后在第一个活动中使用这个：-

ByteArrayOutputStream bs = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 100, bs);
byte[] byteArray = bs.toByteArray();
intent.putExtra("PICTURE", byteArray);
startActivity(intent);

在第二个活动中：-

byte[] byteArray = extras.getByteArray("PICTURE");
bitmap = BitmapFactory.decodeByteArray(byteArray,0,byteArray.length);
imgViewResult.setImageBitmap(bitmap);

Answer 5

您可以将图像的 URI 传递给下一个 Activity。

您从 onActivityResult() 获得的 URI

并在下一个 Activity 的 onCreate() 中。

再次解码Bitmap并将其设置为ImageView

Answer 6

看到这个帖子。

启动第二个 Activity 时，在第一个 Activity 中使用 putExtra。在第二个 Activity 中使用 getExtra() 如下：

在第一个活动中

Intent intent = new Intent(Activity1.this,Activity2.class);
intent.putExtra("bmp",selectedImage);
startActivity(intent);

在第二个活动

Bitmap bmp = this.getIntent().getParcelableExtra("bmp");

Answer 7

将您的图像转换为base64字符串格式并将其传递给下一个活动，然后再次将其解码为位图。

Answer 8

在第一个活动中：

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if(requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK){
        Intent showImageIntent = new Intent(this, ShowCameraPicture.class);
        showImageIntent.fillIn(data,Intent.FILL_IN_DATA);
        startActivity(showImageIntent);
    }
}

在第二个活动中：

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    Bundle bundle = getIntent().getExtras();
    if(bundle!=null){
        Bitmap image = (Bitmap)bundle.get("data");
        //do whatever you need to do with the bitmap here ...
    }       
}       

Answer 9

/////////firstActivity.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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="com.app.myapp.com.app44sendinginfofromoneactivitytoanother.MainActivity">

    <RelativeLayout
        android:layout_width="368dp"
        android:layout_height="495dp"
        tools:layout_editor_absoluteX="8dp"
        tools:layout_editor_absoluteY="8dp">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_centerHorizontal="true"
            android:layout_centerVertical="true"
            android:orientation="vertical">

            <EditText
                android:id="@+id/edtName"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:ems="10"
                android:hint="Enter NAme"
                android:inputType="textPersonName" />

            <EditText
                android:id="@+id/edtLastName"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:ems="10"
                android:hint="Enter LastName"
                android:inputType="textPersonName" />

            <EditText
                android:id="@+id/edtEmail"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:ems="10"
                android:hint="Enter Email"
                android:inputType="textPersonName" />

            <EditText
                android:id="@+id/edtPassword"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:ems="10"
                android:hint="Enter Password"
                android:inputType="textPassword" />

            <ImageView
                android:id="@+id/imgView"
                android:layout_width="match_parent"
                android:layout_height="200dp"
                app:srcCompat="@android:drawable/ic_menu_report_image" />

            <RadioGroup
                android:id="@+id/rdoGroup"
                android:layout_width="match_parent"
                android:layout_height="50dp">

                <RadioButton
                    android:id="@+id/rdoMale"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_weight="1"
                    android:text="Male" />

                <RadioButton
                    android:id="@+id/rdoFemale"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_weight="1"
                    android:text="Female" />
            </RadioGroup>

            <Button
                android:id="@+id/btnSend"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="10dp"
                android:text="Send" />
        </LinearLayout>
    </RelativeLayout>

</android.support.constraint.ConstraintLayout>

///////////// MainActivity.java

    public class MainActivity extends AppCompatActivity implements View.OnClickListener,CompoundButton.OnCheckedChangeListener{

    EditText edtName,edtLastName,edtEmail,edtPassword;
    ImageView imgView;
    RadioButton rdoMale,rdoFemale;
    Button btnSend;
    String genderType = "";
    int CAMERA_PIC_REQUEST = 99;
    Bitmap bitmap; // your bitmap

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        edtName = (EditText) findViewById(R.id.edtName);
        edtLastName = (EditText) findViewById(R.id.edtLastName);
        edtEmail = (EditText) findViewById(R.id.edtEmail);
        edtPassword = (EditText) findViewById(R.id.edtPassword);
        btnSend = (Button) findViewById(R.id.btnSend);
        imgView = (ImageView) findViewById(R.id.imgView);
        rdoMale = (RadioButton) findViewById(R.id.rdoMale);
        rdoFemale = (RadioButton) findViewById(R.id.rdoFemale);
        btnSend.setOnClickListener(MainActivity.this);
        imgView.setOnClickListener(MainActivity.this);
        rdoMale.setOnCheckedChangeListener(MainActivity.this);
        rdoFemale.setOnCheckedChangeListener(MainActivity.this);

    }


    @Override
    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
        switch (buttonView.getId()){
            case R.id.rdoMale:
                if (isChecked){
                    genderType = "Male";
                }else{

                    buttonView.setChecked(false);
                }

                break;
            case R.id.rdoFemale:
                if (isChecked){
                    genderType = "Female";
                }else{

                    buttonView.setChecked(false);
                }
                break;
        }
    }

    @Override
    public void onClick(View v) {
        switch(v.getId()){
            case R.id.btnSend:

                    Intent intent = new Intent(MainActivity.this,SecondActivity.class);
                    intent.putExtra("NAME",edtName.getText().toString());
                    intent.putExtra("LASTNAME",edtLastName.getText().toString());
                    intent.putExtra("EMAIL",edtEmail.getText().toString());
                    intent.putExtra("PASSWORD",edtPassword.getText().toString());
                    intent.putExtra("GENDER",genderType);

                     //below is the code which you are looking for 

              -->    ByteArrayOutputStream bs = new ByteArrayOutputStream();
              -->    bitmap.compress(Bitmap.CompressFormat.PNG, 100, bs);
                     byte[] byteArray = bs.toByteArray();
                     intent.putExtra("PICTURE", byteArray);
                     startActivity(intent);
            break;
            case R.id.imgView:
                Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
                startActivityForResult(cameraIntent, CAMERA_PIC_REQUEST);
                break;
        }
    }



    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode,resultCode,data);
        if (requestCode == CAMERA_PIC_REQUEST) {
            bitmap = (Bitmap) data.getExtras().get("data");
            imgView.setImageBitmap(bitmap);

        }
    }

}

////////////////// SecondActivity.xml

    <?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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="com.app.myapp.com.app44sendinginfofromoneactivitytoanother.ResultActivity">

    <RelativeLayout
        android:layout_width="368dp"
        android:layout_height="495dp"
        tools:layout_editor_absoluteX="8dp"
        tools:layout_editor_absoluteY="8dp">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_centerHorizontal="true"
            android:layout_centerVertical="true"
            android:orientation="vertical">

            <TextView
                android:id="@+id/txtName"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="10dp"
                android:text="FirstName:"
                android:textSize="24sp" />

            <TextView
                android:id="@+id/txtLast"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="10dp"
                android:text="LastName:"
                android:textSize="24sp" />

            <TextView
                android:id="@+id/txtEmail"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="10dp"
                android:text="Email:"
                android:textSize="24sp" />

            <TextView
                android:id="@+id/txtPassword"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="10dp"
                android:text="Password:"
                android:textSize="24sp" />

            <TextView
                android:id="@+id/txtGender"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="10dp"
                android:text="Gender:"
                android:textSize="24sp" />

            <ImageView
                android:id="@+id/imgViewResult"
                android:layout_width="match_parent"
                android:layout_height="200dp"
                app:srcCompat="@android:drawable/ic_menu_report_image" />

        </LinearLayout>
    </RelativeLayout>
</android.support.constraint.ConstraintLayout>

///////// SecondActivity.Java

    public class SecondActivity extends AppCompatActivity {

    Context ctx ;
    TextView txtName,txtLast,txtEmail,txtPassword,txtGender;
    ImageView imgViewResult;
    Bitmap bitmap;

    @Override
    protected void onCreate(Bundle bundle) {
        super.onCreate(bundle);
        ctx = this;
        setContentView(R.layout.activity_result);

        txtName = (TextView) findViewById(R.id.txtName);
        txtLast = (TextView) findViewById(R.id.txtLast);
        txtEmail = (TextView) findViewById(R.id.txtEmail);
        txtPassword = (TextView) findViewById(R.id.txtPassword);
        txtGender = (TextView) findViewById(R.id.txtGender);
        imgViewResult = (ImageView) findViewById(R.id.imgViewResult);

        Bundle extras = getIntent().getExtras();
        String Name = extras.getString("NAME");
        String LastName = extras.getString("LASTNAME");
        String Email = extras.getString("EMAIL");
        String Password = extras.getString("PASSWORD");
        String Gender = extras.getString("GENDER");

        txtName.setText("Name: "+Name);
        txtLast.setText("LastName: "+LastName);
        txtEmail.setText("Email: "+Email);
        txtPassword.setText("Password: "+Password);
        txtGender.setText("Gender: "+Gender);

        byte[] byteArray = extras.getByteArray("PICTURE");
        bitmap = BitmapFactory.decodeByteArray(byteArray,0,byteArray.length);
        imgViewResult.setImageBitmap(bitmap);


   }

}

快乐编码 :)

Answer 10

第一个活动：

Intent intent = new Intent(CurrentActivity, secondActivity.class);

intent.putExtra("resId", R.drawable.your image);
startActivity(intent);

然后你的目标活动：

Bundle bundle = getIntent().getExtras();

if(bundle!=null){
    int image = bundle.getInt("resId");
    ImageId.setImageResource(image);
}