如何在片段中创建Anychart图？

编程问答 2022-08-14

问题描述

我正在尝试通过youtube教程（[链接] [1]）使用Android Studio创建一个录音应用。除了通常的教程之外，我还想添加另一个Button来使用Anychart指向带有图形的页面。我设置了整个页面而没有错误，但是在模拟器上，该应用程序一直崩溃，没有任何解释。

我的代码：
RecordFragment.java 


import android.Manifest;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.pm.PackageManager;
import android.media.MediaRecorder;
import android.os.Build;
import android.os.Bundle;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.core.app.ActivityCompat;
import androidx.fragment.app.Fragment;
import androidx.navigation.NavController;
import androidx.navigation.Navigation;

import android.os.SystemClock;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Chronometer;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;


/**
 * A simple {@link Fragment} subclass.
 */
public class RecordFragment extends Fragment implements View.OnClickListener {

    private NavController navController;

    private ImageButton listBtn;
    private ImageButton chartBtn;
    private ImageButton recordBtn;
    private TextView filenameText;

    private boolean isRecording = false;

    private String recordPermission = Manifest.permission.RECORD_AUdio;
    private int PERMISSION_CODE = 21;

    private MediaRecorder mediaRecorder;
    private String recordFile;

    private Chronometer timer;

    public RecordFragment() {
        // required empty public constructor
    }


    @Override
    public View onCreateView(LayoutInflater inflater,ViewGroup container,Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        return inflater.inflate(R.layout.fragment_record,container,false);
    }

    @Override
    public void onViewCreated(@NonNull View view,@Nullable Bundle savedInstanceState) {
        super.onViewCreated(view,savedInstanceState);

        //Intitialize Variables
        navController = Navigation.findNavController(view);
        listBtn = view.findViewById(R.id.record_list_btn);
        chartBtn = view.findViewById(R.id.chart_btn);
        recordBtn = view.findViewById(R.id.record_btn);
        timer = view.findViewById(R.id.record_timer);
        filenameText = view.findViewById(R.id.record_filename);

        /* Setting up on click listener
           - Class must implement 'View.OnClickListener' and override 'onClick' method
         */
        listBtn.setonClickListener(this);
        chartBtn.setonClickListener(this);
        recordBtn.setonClickListener(this);


    }

    @Override
    public void onClick(View v) {
        /*  Check,which button is pressed and do the task accordingly
        */
        switch (v.getId()) {
            case R.id.record_list_btn:
                /*
                Navigation Controller
                Part of Android Jetpack,used for navigation between both fragments
                 */
                if(isRecording){
                    AlertDialog.Builder alertDialog = new AlertDialog.Builder(getContext());
                    alertDialog.setPositiveButton("OKAY",new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog,int which) {
                            navController.navigate(R.id.action_recordFragment_to_audioListFragment);
                            isRecording = false;
                        }
                    });
                    alertDialog.setNegativeButton("CANCEL",null);
                    alertDialog.setTitle("Audio Still recording");
                    alertDialog.setMessage("Are you sure,you want to stop the recording?");
                    alertDialog.create().show();
                } else {
                    navController.navigate(R.id.action_recordFragment_to_audioListFragment);
                }
                break;

            case R.id.chart_btn:
                /*
                Navigation Controller
                Part of Android Jetpack,int which) {
                            navController.navigate(R.id.action_recordFragment_to_chartFragment);
                            isRecording = false;
                        }
                    });
                    alertDialog.setNegativeButton("CANCEL",you want to stop the recording?");
                    alertDialog.create().show();
                } else {
                    navController.navigate(R.id.action_recordFragment_to_chartFragment);
                }
                break;

            case R.id.record_btn:
                if(isRecording) {
                    //Stop Recording
                    stopRecording();

                    // Change button image and set Recording state to false
                    recordBtn.setimageDrawable(getResources().getDrawable(R.drawable.record_btn_stopped,null));
                    isRecording = false;
                } else {
                    //Check permission to record audio
                    if(checkPermissions()) {
                        //Start Recording
                        startRecording();

                        // Change button image and set Recording state to false
                        recordBtn.setimageDrawable(getResources().getDrawable(R.drawable.record_btn_recording,null));
                        isRecording = true;
                    }
                }
                break;
        }
    }

    private void stopRecording() {
        //Stop Timer,very obvIoUs
        timer.stop();

        //Change text on page to file saved
        filenameText.setText("Recording Stopped,File Saved : " + recordFile);

        //Stop media recorder and set it to null for further use to record new audio
        mediaRecorder.stop();
        mediaRecorder.release();
        mediaRecorder = null;
    }

    private void startRecording() {
        //Start timer from 0
        timer.setBase(SystemClock.elapsedRealtime());
        timer.start();

        //Get app external directory path
        String recordpath = getActivity().getExternalFilesDir("/").getAbsolutePath();

        //Get current date and time
        SimpleDateFormat formatter = new SimpleDateFormat("yyyy_MM_dd_hh_mm_ss",Locale.CANADA);
        Date Now = new Date();

        //initialize filename variable with date and time at the end to ensure the new file wont overwrite prevIoUs file
        recordFile = "Recording_" + formatter.format(Now) + ".3gp";

        filenameText.setText("Recording,File Name : " + recordFile);

        //Setup Media Recorder for recording
        mediaRecorder = new MediaRecorder();
        mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
        mediaRecorder.setoutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
        mediaRecorder.setoutputFile(recordpath + "/" + recordFile);
        mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);

        try {
            mediaRecorder.prepare();
        } catch (IOException e) {
            e.printstacktrace();
        }

        //Start Recording
        mediaRecorder.start();
    }

    private boolean checkPermissions() {
        //Check permission
        if (ActivityCompat.checkSelfPermission(getContext(),recordPermission) == PackageManager.PERMISSION_GRANTED) {
            //Permission Granted
            return true;
        } else {
            //Permission not granted,ask for permission
            ActivityCompat.requestPermissions(getActivity(),new String[]{recordPermission},PERMISSION_CODE);
            return false;
        }
    }

    @Override
    public void onStop() {
        super.onStop();
        if(isRecording){
            stopRecording();
        }
    }
}

ChartFragment.java ：


import android.os.Bundle;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
import androidx.navigation.NavController;
import androidx.navigation.Navigation;

import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import android.widget.Toast;

import com.anychart.APIlib;
import com.anychart.AnyChart;
import com.anychart.AnyChartView;
import com.anychart.chart.common.dataentry.DataEntry;
import com.anychart.chart.common.dataentry.ValueDataEntry;
import com.anychart.chart.common.listener.Event;
import com.anychart.chart.common.listener.ListenersInterface;
import com.anychart.charts.Radar;
import com.anychart.core.radar.series.Line;
import com.anychart.data.Mapping;
import com.anychart.data.Set;
import com.anychart.enums.Align;
import com.anychart.enums.MarkerType;

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

/**
 * A simple {@link Fragment} subclass.
 */
abstract class ChartFragment extends Fragment implements View.OnClickListener{

    private NavController navController;

    private AnyChartView chart1;
    private AnyChartView chart2;
    private AnyChartView chart3;

    public ChartFragment() {
        // required empty public constructor
    }


    @Override
    public View onCreateView(LayoutInflater inflater,Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragment_chart,container);
    }

    @Override
    public void onViewCreated(@NonNull View view,savedInstanceState);
        navController = Navigation.findNavController(view);
        chart1 = view.findViewById(R.id.any_chart_view);
        chart2 = view.findViewById(R.id.any_chart_view1);
        chart3 = view.findViewById(R.id.any_chart_view2);

        Radar radar = AnyChart.radar();

        radar.title("Evidence Parsing Statistics");

        radar.yScale().minimum(0d);
        radar.yScale().minimumGap(0d);
        radar.yScale().ticks().interval(50d);

        radar.xAxis().labels().padding(5d,5d,5d);

        radar.legend()
                .align(Align.CENTER)
                .enabled(true);

        List<DataEntry> data1 = new ArrayList<>();
        data1.add(new CustomDataEntry("Doubts",136,199,43));
        data1.add(new CustomDataEntry("Engagement",179,125,56));
        data1.add(new CustomDataEntry("PLE",149,173,101));
        data1.add(new CustomDataEntry("pulse",135,33,202));
        data1.add(new CustomDataEntry("Resources",158,64,196));

        Set set = Set.instantiate();
        set.data(data1);
        Mapping shamanData = set.mapAs("{ x: 'x',value: 'value' }");
        Mapping warriorData = set.mapAs("{ x: 'x',value: 'value2' }");
        Mapping priestData = set.mapAs("{ x: 'x',value: 'value3' }");

        Line shamanLine = radar.line(shamanData);
        shamanLine.name("History");
        shamanLine.markers()
                .enabled(true)
                .type(MarkerType.CIRCLE)
                .size(3d);

        Line warriorLine = radar.line(warriorData);
        warriorLine.name("Math");
        warriorLine.markers()
                .enabled(true)
                .type(MarkerType.CIRCLE)
                .size(3d);

        Line priestLine = radar.line(priestData);
        priestLine.name("Geography");
        priestLine.markers()
                .enabled(true)
                .type(MarkerType.CIRCLE)
                .size(3d);

        radar.tooltip().format("Value: {%Value}");

        chart1.setChart(radar);
    }

    private class CustomDataEntry extends ValueDataEntry {
        public CustomDataEntry(String x,Number value,Number value2,Number value3) {
            super(x,value);
            setValue("value2",value2);
            setValue("value3",value3);
        }
    }
}

activity_main.xml ：

<androidx.coordinatorlayout.widget.CoordinatorLayout 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=".MainActivity">

    <fragment
        android:id="@+id/fragment_container"
        android:name="androidx.navigation.fragment.NavHostFragment"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:navGraph="@navigation/nav_graph"
        app:defaultNavHost="true"
        />

</androidx.coordinatorlayout.widget.CoordinatorLayout>

Navgraph.xml ：

<navigation 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:id="@+id/nav_graph"
    app:startDestination="@id/recordFragment">

    <fragment
        android:id="@+id/recordFragment"
        android:name="com.tvacstudio.audiorecorder.RecordFragment"
        android:label="fragment_record"
        tools:layout="@layout/fragment_record" >
        <action
            android:id="@+id/action_recordFragment_to_audioListFragment"
            app:destination="@id/audioListFragment"
            app:exitAnim="@anim/fade_out"
            app:popEnteranim="@anim/fade_in"
            app:enteranim="@anim/slide_in"
            app:popExitAnim="@anim/slide_out"
            />
        <action
            android:id="@+id/action_recordFragment_to_chartFragment"
            app:destination="@id/chartFragment"
            app:enteranim="@anim/slide_out"
            app:exitAnim="@anim/fade_out"
            app:popEnteranim="@anim/fade_in"
            app:popExitAnim="@anim/slide_in" />
    </fragment>
    <fragment
        android:id="@+id/audioListFragment"
        android:name="com.tvacstudio.audiorecorder.AudioListFragment"
        android:label="fragment_audio_list"
        tools:layout="@layout/fragment_audio_list" />
    <fragment
        android:id="@+id/chartFragment"
        android:name="com.tvacstudio.audiorecorder.ChartFragment"
        android:label="ChartFragment" />
</navigation>

Fragment_chart.xml ：

<?xml version="1.0" encoding="utf-8"?>

<ScrollView 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"
    android:fillViewport="true">

    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        tools:context=".MainActivity">

        <com.anychart.AnyChartView
            android:id="@+id/any_chart_view"
            android:layout_width="match_parent"
            android:layout_height="300dp"
            android:layout_marginEnd="8dp"
            app:layout_constraintEnd_toEndOf="@id/any_chart_view1"
            app:layout_constraintTop_toTopOf="parent" />

        <com.anychart.AnyChartView
            android:id="@+id/any_chart_view1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:layout_constraintTop_toBottomOf="@id/any_chart_view"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintBottom_toTopOf="@+id/any_chart_view2"
            />

        <com.anychart.AnyChartView
            android:id="@+id/any_chart_view2"
            android:layout_width="match_parent"
            android:layout_height="400dp"
            app:layout_constraintTop_toBottomOf="@+id/any_chart_view1"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintBottom_toBottomOf="parent"
            />
    </androidx.constraintlayout.widget.ConstraintLayout>

</ScrollView>

我是Android Studio的新手，所以我们将不胜感激。 :) [1]：https://www.youtube.com/watch?v=ErJTqF14Ofk

解决方法

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androidandroidandroid-fragmentsandroid-studiofragmentfragmentjavajava