标签: android-intent

这是我的 Android 应用程序的一个 Activity：现在我只是测试返回到另一个 Activity 效果是否良好。问题是：当我点击后退按钮时，一切都会正常发生，但是当我按下 ActionBar 中屏幕左上角的后退箭头时，该 Activity 不会进入 onBackPressed() 方法（因此其他 Activity 崩溃了）因为它期望意图通过）。关于如何解决这个问题有什么想法吗？

package com.example.thefe.newsmartkedex;

import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;

/**
 * Created by TheFe on 20/10/2016.
 */

public class MyPokeDetails extends AppCompatActivity {

    int pokeID;

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

        Intent j = getIntent();
        pokeID = j.getExtras().getInt("id");

        getActionBar();

        Button back = (Button)findViewById(R.id.back);

        back.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent i = new Intent (getApplicationContext(), PokemonDetails.class);
                i.putExtra("id", pokeID); …

我的语法可以在 android 5.1 上运行，但在 android 7.1 上不起作用......

File file = new File(Environment.getExternalStorageDirectory(), "Pictures/1481853170451.jpg");
Toast.makeText(MainActivity.this, file.getPath(), Toast.LENGTH_LONG).show();
Uri path = Uri.fromFile(file);

if (file.exists()) {
  Intent intent = new Intent();
  intent.setAction(android.content.Intent.ACTION_VIEW);
  intent.setDataAndType(path, "image/*");
  intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
try {                       
  this.startActivity(intent);
} catch (ActivityNotFoundException e) {
}

谁能告诉我可能的答案。先感谢您....

我想从图库中选择一张图像并获取它的路径。这是我用来打开画廊的代码

Intent intent = new Intent();
                    intent.setType("image/*");
                    intent.setAction(Intent.ACTION_GET_CONTENT);
                    startActivityForResult(Intent.createChooser(intent,
                            "Select Picture"), 1111);

和onActivityResult

protected void onActivityResult(int requestCode, int resultCode, Intent imageReturnedIntent) {
    super.onActivityResult(requestCode, resultCode, imageReturnedIntent);
    if (resultCode == RESULT_OK) {
        Uri selectedImageUri = imageReturnedIntent.getData();

        String[] filePathColumn = {MediaStore.Images.Media.DATA};
        Cursor cursor = getContentResolver().query(selectedImageUri, filePathColumn, null, null, null);
        cursor.moveToFirst();
        int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
        String filePath = cursor.getString(columnIndex);
        cursor.close();

        Log.d("TAG", "onActivityResult: " + filePath);
    }
}

filePathnull如果我从默认系统图像选择器中选择图像，则总是如此，尽管如果从图库应用程序中选择图像，它工作正常。我的代码有什么问题？

我sendData从发送StartActivity到ResultActivity。

val sendData = SendData(10, "xyz", "yss")
sendData.e = 933
sendData.f = "hello"
sendData.g = 39

// Log.d("A", "${sendData.toString}")
val intent = Intent(this@StartActivity, ResultActivity::class.java)
intent.putExtra(RESULT_DATA, sendData)
startActivity(intent)

sendData = intent.extras!!.getParcelable(RESULT_DATA)
// Log.d("B", "${sendData.toString}")

模型类看起来像这样。

@Parcelize
data class SendData(var a: Int, var b: String, var c: String) : Parcelable {
    var e: Int? = null
    var f: String? = null
    var g: Int? = null
    
    var isClicked = false

    override fun toString(): String{
        return JsonUtil.toJson(this) …

我正在使用文件选择器库。

权限代码：

    if (Build.VERSION.SDK_INT < Build.VERSION_CODES.R || Environment.isExternalStorageManager()) {
                        //Toast.makeText(this, "We can access all files on external storage now", Toast.LENGTH_SHORT).show()
                    } else {
                        Intent intent = new Intent(Settings.ACTION_MANAGE_ALL_FILES_ACCESS_PERMISSION);
                        startActivityForResult(intent, FILE_REQUEST_CODE);
                    
                    }

选择文件：

    Intent intent = new Intent(this, FilePickerActivity.class);
            
                    intent.putExtra(FilePickerActivity.CONFIGS, new Configurations.Builder()
                            .setCheckPermission(true)
                            .setSelectedMediaFiles(mediaFiles)
                            .setShowFiles(true)
                            .setShowImages(false)
                            .setShowAudios(false)
                            .setShowVideos(false)
                            .setIgnoreNoMedia(false)
                            .enableVideoCapture(false)
                            .enableImageCapture(false)
                            .setIgnoreHiddenFile(false)
                            .setMaxSelection(5)
                            .setSuffixes("pdf", "doc", "docx")
                            //.setTitle("Select a file")
                            .build());
                    startActivityForResult(intent, FILE_REQUEST_CODE);

onActivityResult:

    if (requestCode == FILE_REQUEST_CODE && resultCode == RESULT_OK && data != null) {
            //ArrayList<MediaFile> files …

我有一个导航按钮，单击该按钮后应该打开 Google 地图或 Apple 地图应用程序（以安装的为准），并显示从当前位置到目的地位置的导航方向

我使用url_launcher包尝试了以下方法

1. await launchUrlString("https://www.google.com/maps/dir/?api=1&origin=${position.latitude},${position.longitude}&destination=${vendorPosition.latitude},${vendorPosition.longitude}");

2. await launchUrl(Uri.parse("google.navigation:q=${position.latitude},${position.longitude}&mode=d"));

这两种方法都没有按预期工作，特别是因为这仅使用谷歌地图 URI

我正在尝试Activity从ListViewAndroid中的自定义适配器启动.我正在声明上下文,但Logcat显示找不到Context.我在这里上传我的代码

    @Override
public View getView(final int position, View convertView, ViewGroup parent) {
    // convert view = design
    View v = convertView;
    //context = this;

    if (v == null) {
        holder = new ViewHolder();
        holder = new ViewHolder();
        v = vi.inflate(Resource, null);
        holder.imageview = (ImageView) v.findViewById(R.id.ivImage);
        holder.tvName = (TextView) v.findViewById(R.id.tvName);
        holder.tvDescription = (TextView) v.findViewById(R.id.tvDescriptionn);
        holder.tvDOB = (TextView) v.findViewById(R.id.tvDateOfBirth);
        holder.tvCountry = (TextView) v.findViewById(R.id.tvCountry);
        holder.tvHeight = (TextView) v.findViewById(R.id.tvHeight);
        holder.tvSpouse = (TextView) v.findViewById(R.id.tvSpouse);
        holder.tvChildren = (TextView) v.findViewById(R.id.tvChildren);
        v.setTag(holder);
    } else …

我试图从库中选择一个图像并将位图设置为我的imageview,但我有一个问题:在我的设备中,运行良好,但它在其他方面不起作用.

我在片段中启动图像选择器如下:

Intent photoPickerIntent = new Intent(Intent.ACTION_PICK); photoPickerIntent.setType("image/*"); startActivityForResult(photoPickerIntent, SELECT_PHOTO);

这是我的onActivityResult:

@Override 
public void onActivityResult(int requestCode, int resultCode, Intent imageReturnedIntent) { 

         super.onActivityResult(requestCode, resultCode, imageReturnedIntent); 

         Log.d("ResultCode",resultCode+"");

         switch (requestCode) { 

               case SELECT_PHOTO:
                     if (resultCode == Activity.RESULT_OK) { 
                             Uri selectedImage = imageReturnedIntent.getData(); 
                             try { 
                                    Bitmap imagen = decodeUri(selectedImage);

                                     // Works on my device (because resultCode = RESULT_OK) but doesn't work in others (because resultCode = 0)
                                    ((ImageView) findViewById(R.id.myimage)).setImageBitmap(imagen); 

                             } catch (FileNotFoundException e) { 
                                    e.printStackTrace(); 
                             } 
                     } 
           } 
}

我很感激任何帮助,我有点绝望.X_X

我正在调用Activity AddRecordActivityfrom Activity ViewRecordsActivity.两者都延伸AppCompatActivity.

我打电话给AddRecordActivity,

startActivityForResult(intent, Constants.MY_REQUEST_CODE);

在AddRecordActivity我打电话添加记录后,下面的代码:

Intent intent = new Intent(AddRecordActivity.this, ViewRecordsActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
intent.putExtra(Constants.EXTRA_OPERATION_SUCCESS_TEXT, "Record added");
setResult(RESULT_OK, intent);
startActivity(intent);
finish();

在ViewRecordsActivity,

    @Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (resultCode == RESULT_OK) {
        switch (requestCode) {
            case Constants.MY_REQUEST_CODE: {
                Toast.makeText(this, data.getStringExtra(Constants.EXTRA_OPERATION_SUCCESS_TEXT), Toast.LENGTH_SHORT).show();
            }
            break;
        }
    }
}

我不明白为什么事件onActivityResult没有被触发？

我正在尝试在设置中添加“发送反馈”选项。主题和文字效果很好。但是电子邮件地址将不被接受。我该怎么办，因为我认为这是重要的额外信息，所以电子邮件被接受了吗？

<Preference
    android:title="Send Feedback">
    <intent
        android:action="android.intent.action.SEND"
        android:mimeType="text/email">
        <extra
            android:name="android.intent.extra.EMAIL"
            android:value="mailto@email.com"/>
        <extra
            android:name="android.intent.extra.SUBJECT"
            android:value="Feedback"/>
        <extra
            android:name="android.intent.extra.TEXT"
            android:value="Text of Feedback"/>
    </intent>
</Preference>