Android的 - 的ImageView我怎样才能获得摄像机图像？其中，结果code为0，并要求code为2？ [英] Android - ImageView how can i get the camera picture? where resultCode is 0 and requestCode is 2?
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问题描述
获取结果code = 0，并要求code = 2，不能获得与picView画面。
进口android.os.Bundle;
进口android.app.Activity;
进口android.view.Menu;进口android.app.Activity;
进口android.content.ActivityNotFoundException;
进口android.content.Intent;
进口android.graphics.Bitmap;
进口android.net.Uri;
进口android.os.Bundle;
进口android.provider.MediaStore;
进口android.view.View;
进口android.view.View.OnClickListener;
进口android.widget.Button;
进口android.widget.ImageView;
进口android.widget.Toast;公共类MainActivity扩展活动实现OnClickListener {
最终诠释CAMERA_CAPTURE = 1;
最终诠释PIC_CROP = 2;
私人乌里picUri; @覆盖
保护无效的onCreate（捆绑savedInstanceState）{
super.onCreate（savedInstanceState）;
的setContentView（R.layout.activity_main）;
按钮captureBtn =（按钮）findViewById（R.id.capture_btn）;
captureBtn.setOnClickListener（本）;
} / **
*点击的方法来处理用户pressing按钮启动相机
* /
公共无效的onClick（视图v）{
如果（v.getId（）== R.id.capture_btn）{
尝试{
意图captureIntent =新意图（MediaStore.ACTION_IMAGE_CAPTURE）;
startActivityForResult（captureIntent，CAMERA_CAPTURE）;
}
赶上（ActivityNotFoundException anfe）{
字符串的errorMessage =哎呦 - 你的设备不支持拍摄照片！
吐司面包= Toast.makeText（这一点，的errorMessage，Toast.LENGTH_SHORT）;
toast.show（）;
}
}
} / **
*处理用户来自捕获返回和裁剪图像
* /
保护无效的onActivityResult（INT申请code，INT结果code，意图数据）{
如果（结果code == RESULT_OK）{
如果（要求code == CAMERA_CAPTURE）{
picUri = data.getData（）;
performCrop（）;
}
否则，如果（要求code == PIC_CROP）{
捆绑额外= data.getExtras（）;
位图thePic = extras.getParcelable（数据）;
ImageView的picView =（ImageView的）findViewById（R.id.picture）;
picView.setImageBitmap（thePic）;
}
}其他{
字符串的errorMessage =哎呦 - 结果code的回报：+结果code +的要求code：+请求code;
吐司面包= Toast.makeText（这一点，的errorMessage，Toast.LENGTH_SHORT）;
toast.show（）;
}
}
/ **
* Helper方法来进行操作作物
* /
私人无效performCrop（）{
尝试{
意图cropIntent =新意图（com.android.camera.action.CROP）;
cropIntent.setDataAndType（picUri，图像/ *）;
cropIntent.putExtra（裁剪，真）;
cropIntent.putExtra（aspectX，1）;
cropIntent.putExtra（aspectY，1）;
cropIntent.putExtra（outputX，256）;
cropIntent.putExtra（outputY，256）;
cropIntent.putExtra（回归数据，真正的）;
startActivityForResult（cropIntent，PIC_CROP）;
}
赶上（ActivityNotFoundException anfe）{
字符串的errorMessage =哎呦 - 你的设备不支持作物的行动！
吐司面包= Toast.makeText（这一点，的errorMessage，Toast.LENGTH_SHORT）;
toast.show（）;
}
}}
的 修改的（添加为以下，其中data.getData（）始终为null）
最终诠释CAPTURE_IMAGE_ACTIVITY_REQUEST_ code = 100;
最终诠释CAPTURE_VIDEO_ACTIVITY_REQUEST_ code = 200;公共无效的onClick（视图v）{
如果（v.getId（）== R.id.capture_btn）{
尝试{
意图captureIntent =新意图（MediaStore.ACTION_IMAGE_CAPTURE）;
// startActivityForResult（captureIntent，CAMERA_CAPTURE）;
startActivityForResult（captureIntent，CAPTURE_IMAGE_ACTIVITY_REQUEST_ code）;
}
赶上（ActivityNotFoundException anfe）{
字符串的errorMessage =哎呦 - 你的设备不支持拍摄照片！
吐司面包= Toast.makeText（这一点，的errorMessage，Toast.LENGTH_SHORT）;
toast.show（）;
}
}
} @覆盖
保护无效的onActivityResult（INT申请code，INT结果code，意图数据）{
如果（要求code == CAPTURE_IMAGE_ACTIVITY_REQUEST_ code）{
如果（结果code == RESULT_OK）{
//图像捕获，并在指定的意图保存到了fileURI
Toast.makeText（这一点，图像保存到：\\ n+
data.getData（），Toast.LENGTH_LONG）.show（）;
}否则如果（结果code == RESULT_CANCELED）{
//用户取消了图像采集
}其他{
//图像捕捉失败，提醒用户
}
} 如果（要求code == CAPTURE_VIDEO_ACTIVITY_REQUEST_ code）{
如果（结果code == RESULT_OK）{
//视频捕获，并在指定的意图保存到了fileURI
Toast.makeText（这一点，视频保存到：\\ n+
data.getData（），Toast.LENGTH_LONG）.show（）;
}否则如果（结果code == RESULT_CANCELED）{
//用户取消了视频拍摄
}其他{
//视频捕获失败，建议用户
}
}
}
编辑2：
保护无效的onActivityResult（INT申请code，INT结果code，意图数据）{
//super.onActivityResult(request$c$c，结果code，数据）;
如果（结果code == Activity.RESULT_OK）{
如果（要求code == CAMERA_CAPTURE）{
picUri = data.getData（）;
performCrop（）;
}
否则，如果（要求code == PIC_CROP）{
捆绑额外= data.getExtras（）;
位图thePic = extras.getParcelable（数据）;
ImageView的picView =（ImageView的）findViewById（R.id.picture）;
picView.setImageBitmap（thePic）;
}
}其他{
字符串的errorMessage =哎呦 - 结果code的回报：+结果code +的要求code：+请求code;
吐司面包= Toast.makeText（这一点，的errorMessage，Toast.LENGTH_SHORT）;
toast.show（）;
捆绑额外= data.getExtras（）;
位图thePic = extras.getParcelable（数据）;
ImageView的picView =（ImageView的）findViewById（R.id.picture）;
picView.setImageBitmap（thePic）;
}
}
解决方案
如果结果code是0，那么就意味着你调用的活动被取消。他们要么必须有pressed后退按钮，职业退休回来了此次活动。改变你的实现是错误的。
Getting resultCode= 0 and requestCode = 2, cant get the picView with picture.
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.app.Activity;
import android.content.ActivityNotFoundException;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;
public class MainActivity extends Activity implements OnClickListener {
final int CAMERA_CAPTURE = 1;
final int PIC_CROP = 2;
private Uri picUri;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button captureBtn = (Button)findViewById(R.id.capture_btn);
captureBtn.setOnClickListener(this);
}
/**
* Click method to handle user pressing button to launch camera
*/
public void onClick(View v) {
if (v.getId() == R.id.capture_btn) {
try {
Intent captureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(captureIntent, CAMERA_CAPTURE);
}
catch(ActivityNotFoundException anfe){
String errorMessage = "Whoops - your device doesn't support capturing images!";
Toast toast = Toast.makeText(this, errorMessage, Toast.LENGTH_SHORT);
toast.show();
}
}
}
/**
* Handle user returning from both capturing and cropping the image
*/
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK) {
if(requestCode == CAMERA_CAPTURE){
picUri = data.getData();
performCrop();
}
else if(requestCode == PIC_CROP){
Bundle extras = data.getExtras();
Bitmap thePic = extras.getParcelable("data");
ImageView picView = (ImageView)findViewById(R.id.picture);
picView.setImageBitmap(thePic);
}
} else {
String errorMessage = "Whoops - resultCode return: " + resultCode +" requestCode: " + requestCode;
Toast toast = Toast.makeText(this, errorMessage, Toast.LENGTH_SHORT);
toast.show();
}
}
/**
* Helper method to carry out crop operation
*/
private void performCrop(){
try {
Intent cropIntent = new Intent("com.android.camera.action.CROP");
cropIntent.setDataAndType(picUri, "image/*");
cropIntent.putExtra("crop", "true");
cropIntent.putExtra("aspectX", 1);
cropIntent.putExtra("aspectY", 1);
cropIntent.putExtra("outputX", 256);
cropIntent.putExtra("outputY", 256);
cropIntent.putExtra("return-data", true);
startActivityForResult(cropIntent, PIC_CROP);
}
catch(ActivityNotFoundException anfe){
String errorMessage = "Whoops - your device doesn't support the crop action!";
Toast toast = Toast.makeText(this, errorMessage, Toast.LENGTH_SHORT);
toast.show();
}
}
}
EDIT: (added as following where data.getData() is null always)
final int CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE = 100;
final int CAPTURE_VIDEO_ACTIVITY_REQUEST_CODE = 200;
public void onClick(View v) {
if (v.getId() == R.id.capture_btn) {
try {
Intent captureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
//startActivityForResult(captureIntent, CAMERA_CAPTURE);
startActivityForResult(captureIntent, CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE);
}
catch(ActivityNotFoundException anfe){
String errorMessage = "Whoops - your device doesn't support capturing images!";
Toast toast = Toast.makeText(this, errorMessage, Toast.LENGTH_SHORT);
toast.show();
}
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE) {
if (resultCode == RESULT_OK) {
// Image captured and saved to fileUri specified in the Intent
Toast.makeText(this, "Image saved to:\n" +
data.getData(), Toast.LENGTH_LONG).show();
} else if (resultCode == RESULT_CANCELED) {
// User cancelled the image capture
} else {
// Image capture failed, advise user
}
}
if (requestCode == CAPTURE_VIDEO_ACTIVITY_REQUEST_CODE) {
if (resultCode == RESULT_OK) {
// Video captured and saved to fileUri specified in the Intent
Toast.makeText(this, "Video saved to:\n" +
data.getData(), Toast.LENGTH_LONG).show();
} else if (resultCode == RESULT_CANCELED) {
// User cancelled the video capture
} else {
// Video capture failed, advise user
}
}
}
EDIT 2:
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
//super.onActivityResult(requestCode, resultCode, data);
if (resultCode == Activity.RESULT_OK) {
if(requestCode == CAMERA_CAPTURE){
picUri = data.getData();
performCrop();
}
else if(requestCode == PIC_CROP){
Bundle extras = data.getExtras();
Bitmap thePic = extras.getParcelable("data");
ImageView picView = (ImageView)findViewById(R.id.picture);
picView.setImageBitmap(thePic);
}
} else {
String errorMessage = "Whoops - resultCode return: " + resultCode +" requestCode: " + requestCode;
Toast toast = Toast.makeText(this, errorMessage, Toast.LENGTH_SHORT);
toast.show();
Bundle extras = data.getExtras();
Bitmap thePic = extras.getParcelable("data");
ImageView picView = (ImageView)findViewById(R.id.picture);
picView.setImageBitmap(thePic);
}
}
解决方案
If resultCode is 0 then it means your invoked activity was cancelled. Either they must have pressed back button, orso to come back to this activity. Changes are your implementation is wrong.
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