【发布时间】：2018-02-07 08:09:22
【问题描述】：
第一个屏幕上传正确并且工作正常（Toast 和所有其他设置和参数），直到我尝试保存结果并通过同一个按钮打开新屏幕。按下按钮会使我手机中的应用程序崩溃，而不会打开第二个屏幕。但是在模拟器中一切正常。
这是主要活动：
public class MainActivity extends AppCompatActivity {
LineChart lineChart1;
RadioGroup rg1,rg2;
Button tipBtn;
Button checkAndCont;
int [] mSlop ={-1,3};
int [] b= {-3,3};
boolean userAnswer1 = false;
boolean userAnswer2 = false;
String quesType = "Slop Recognition";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
lineChart1 = (LineChart)findViewById(R.id.lineChart1);
rg1 = (RadioGroup)findViewById(R.id.rg1);
rg2 = (RadioGroup)findViewById(R.id.rg2);
tipBtn = (Button)findViewById(R.id.tipBtb);
tipBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Toast.makeText(MainActivity.this,"גרף במערכת צירים נקרא משמאל לימין",Toast.LENGTH_SHORT ).show();
}
});
checkAndCont = (Button)findViewById(R.id.checkAndCont);
ArrayList<String> xAxes = new ArrayList<>();
ArrayList<Entry> yAxesLinear1 = new ArrayList<>();
ArrayList<Entry> yAxesLinear2 = new ArrayList<>();
int numberDataPoint = 21;
for (int i=0 ; i<numberDataPoint;i++ ){
int x=i-10;
float funLinear1= mSlop[0]*x+b[0];
float funLinear2= mSlop[1]*x+b[1];
yAxesLinear1.add(new Entry(x,funLinear1));
yAxesLinear2.add(new Entry(x,funLinear2));
//xAxes.add(i,String.valueOf(x));
}
//String [] xaxes = new String[xAxes.size()];
//for (int i=0; i<xAxes.size(); i++){
// xaxes[i]=xAxes.get(i);
//}
ArrayList<ILineDataSet> lineDataSet= new ArrayList<>();
LineDataSet lineDataSet1 = new LineDataSet(yAxesLinear1,"פונקציה קווית 1");
lineDataSet1.setDrawCircles(false);
lineDataSet1.setColor(Color.CYAN);
lineDataSet1.setDrawValues(false);
lineDataSet1.setLineWidth(3);
LineDataSet lineDataSet2 = new LineDataSet(yAxesLinear2,"פונקציה קווית 2");
lineDataSet2.setDrawCircles(false);
lineDataSet2.setColor(Color.GREEN);
lineDataSet2.setDrawValues(false);
lineDataSet2.setLineWidth(3);
lineDataSet.add(lineDataSet1);
lineDataSet.add(lineDataSet2);
lineChart1.setData(new LineData(lineDataSet));
lineChart1.setDrawBorders(true);
lineChart1.setBorderColor(0xffff00ff);
lineChart1.setBorderWidth(2);
lineChart1.setScaleEnabled(true);
//lineChart1.setDrawGridBackground(true);
//lineChart1.setGridBackgroundColor(0xffff00ff);
//lineChart1.setBackgroundColor(0x00000000);
XAxis xAxis = lineChart1.getXAxis();
//xAxis.setEnabled(true);
xAxis.setDrawAxisLine(true);
xAxis.setAxisLineColor(Color.WHITE);
lineChart1.getXAxis().setPosition(XAxis.XAxisPosition.BOTTOM);
lineChart1.getAxisRight().setEnabled(false);
lineChart1.getXAxis().setAxisMaximum(10);
lineChart1.getXAxis().setAxisMinimum(-10);
lineChart1.getXAxis().setGridColor(0xffff00ff);
//lineChart1.getXAxis().setDrawAxisLine(true);
//lineChart1.getXAxis().setAxisLineColor(Color.WHITE); // The buttom limit line of the chart
//lineChart1.setVisibleXRangeMaximum(50);
lineChart1.getXAxis().setTextColor(Color.WHITE);
lineChart1.getXAxis().setTextSize(15);
LimitLine ll = new LimitLine(0);
ll.setLineColor(Color.WHITE);
ll.setLineWidth(1);
xAxis.addLimitLine(ll);
YAxis yAxis = lineChart1.getAxisLeft();
yAxis.setDrawZeroLine(true);
yAxis.setZeroLineColor(Color.WHITE);// no grid lines
yAxis.setZeroLineWidth(1); //Sets the line-width of the zero line.
yAxis.setAxisMinimum(-10f); // start at zero
yAxis.setAxisMaximum(10f); // the axis maximum is 100
yAxis.setGridColor(0xffff00ff);
yAxis.setTextColor(Color.WHITE);
yAxis.setTextSize(15);
Legend legend = lineChart1.getLegend();
legend.setEnabled(true);
legend.setTextColor(Color.WHITE);
legend.setTextSize(18);
legend.setFormSize(13);
legend.setForm(Legend.LegendForm.CIRCLE);
legend.setHorizontalAlignment(Legend.LegendHorizontalAlignment.CENTER);
rg1.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup radioGroup, int i) {
RadioButton rb1 = (RadioButton) radioGroup.findViewById(i);
//if(R.id.rg1==i ? userAnswer1==true : userAnswer1==false);
if (null != rb1 && i > -1) {
// checkedId is the RadioButton selected
switch (i) {
case R.id.rb1:
userAnswer1=false;
break;
case R.id.rb2:
userAnswer1=true;
break;
}
}
Toast.makeText(MainActivity.this,Boolean.toString(userAnswer1),Toast.LENGTH_SHORT ).show();
}
});
rg2.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup radioGroup, int i) {
RadioButton rb2 = (RadioButton) radioGroup.findViewById(i);
//if(R.id.rg1==i ? userAnswer1==true : userAnswer1==false);
if (null != rb2 && i > -1) {
// checkedId is the RadioButton selected
switch (i) {
case R.id.rb3:
userAnswer2=false;
break;
case R.id.rb4:
userAnswer2=true;
break;
}
}
Toast.makeText(MainActivity.this,Boolean.toString(userAnswer2),Toast.LENGTH_SHORT ).show();
}
});
}
public void result(View view) {
if (isTrue(mSlop[0])==userAnswer1 && isTrue(mSlop[1])==userAnswer2){
Toast.makeText(MainActivity.this,"תשובה נכונה",Toast.LENGTH_SHORT ).show();
}else {
Toast.makeText(MainActivity.this,"לא נכון",Toast.LENGTH_SHORT ).show();
}
startActivity(new Intent(MainActivity.this, Main2Activity.class));
}
boolean mType;
public boolean isTrue (int m){
if (m >0){
mType=true;
}else{
mType=false;
}
return mType;
}
}
这是相关的 XML：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingTop="5dp"
android:paddingRight="5dp"
android:paddingBottom="5dp"
android:paddingLeft="5dp"
android:background="@drawable/background_color">
<com.github.mikephil.charting.charts.LineChart
android:layout_width="match_parent"
android:layout_height="400dp"
android:id="@+id/lineChart1">
</com.github.mikephil.charting.charts.LineChart>
<TextView
android:id="@+id/tv1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_below="@+id/lineChart1"
android:layout_marginStart="187dp"
android:paddingRight="15dp"
android:text="פונקציה 1 עולה"
android:textColor="#00FFFF"
android:textSize="25sp" />
<TextView
android:id="@+id/tv2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_below="@+id/tv1"
android:layout_marginStart="187dp"
android:paddingRight="15dp"
android:text="פונקציה 2 עולה"
android:textColor="#ff00ff00"
android:textSize="25sp" />
<RadioGroup
android:id="@+id/rg1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_below="@+id/lineChart1"
android:orientation="horizontal">
<RadioButton
android:id="@+id/rb1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:buttonTint="#00FFFF"
android:text="לא נכון"
android:textColor="#00FFFF"
android:paddingLeft="2dp"
android:textSize="25sp"
/>
<RadioButton
android:id="@+id/rb2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:buttonTint="#00FFFF"
android:text="נכון"
android:textColor="#00FFFF"
android:paddingLeft="2dp"
android:textSize="25sp"
android:layout_marginLeft="5sp"/>
</RadioGroup>
<RadioGroup
android:id="@+id/rg2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_below="@+id/rg1"
android:orientation="horizontal">
<RadioButton
android:id="@+id/rb3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:buttonTint="#ff00ff00"
android:text="לא נכון"
android:textColor="#ff00ff00"
android:paddingLeft="2dp"
android:textSize="25sp"
/>
<RadioButton
android:id="@+id/rb4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:buttonTint="#ff00ff00"
android:text="נכון"
android:textColor="#ff00ff00"
android:paddingLeft="2dp"
android:textSize="25sp"
android:layout_marginLeft="5dp"/>
</RadioGroup>
<Button
android:id="@+id/tipBtb"
android:layout_width="50sp"
android:layout_height="50sp"
android:layout_alignParentStart="true"
android:layout_below="@+id/rg2"
android:layout_marginStart="66dp"
android:layout_marginTop="11dp"
android:scaleType="fitCenter"
android:text="TIP" />
<Button
android:id="@+id/checkAndCont"
android:text="שלח"
android:layout_width="80sp"
android:layout_height="50sp"
android:layout_marginTop="11dp"
android:layout_below="@+id/tv2"
android:layout_centerHorizontal="true"
android:onClick="result"/>
</RelativeLayout>
这是第二个活动：
public class Main2Activity extends AppCompatActivity {
LineChart lineChart2;
Button quickTipBtn,sendAndNext;
TextView question1,question2;
EditText answer1,answer2;
final int [] mSlop ={1,3};
final int [] b= {1,3};
private boolean userAnswer1 = false;
private boolean userAnswer2 = false;
final String quesType = "y-intercept Recognition";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
question1 = (TextView)findViewById(R.id.question1);
question2 = (TextView)findViewById(R.id.question2);
answer1 = (EditText)findViewById(R.id.answer1);
answer2 = (EditText)findViewById(R.id.answer2);
quickTipBtn =(Button)findViewById(R.id.quickTipBtn);
quickTipBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Toast.makeText(Main2Activity.this,"קואורדינטת החיתוך עם ציר Y ו b - שווים",Toast.LENGTH_SHORT ).show();
}
});
sendAndNext = (Button)findViewById(R.id.sendAndNext);
lineChart2 = (LineChart)findViewById(R.id.lineChart2);
ArrayList<String> xAxes = new ArrayList<>();
ArrayList<Entry> yAxesLinear1 = new ArrayList<>();
ArrayList<Entry> yAxesLinear2 = new ArrayList<>();
int numberDataPoint = 21;
for (int i=0 ; i<numberDataPoint;i++ ){
int x=i-10;
float funLinear1= mSlop[0]*x+b[0];
float funLinear2= mSlop[1]*x+b[1];
yAxesLinear1.add(new Entry(x,funLinear1));
yAxesLinear2.add(new Entry(x,funLinear2));
//xAxes.add(i,String.valueOf(x));
}
//String [] xaxes = new String[xAxes.size()];
//for (int i=0; i<xAxes.size(); i++){
// xaxes[i]=xAxes.get(i);
//}
ArrayList<ILineDataSet> lineDataSet= new ArrayList<>();
LineDataSet lineDataSet1 = new LineDataSet(yAxesLinear1,"פונקציה קווית 1");
lineDataSet1.setDrawCircles(false);
lineDataSet1.setColor(Color.CYAN);
lineDataSet1.setDrawValues(false);
lineDataSet1.setLineWidth(3);
LineDataSet lineDataSet2 = new LineDataSet(yAxesLinear2,"פונקציה קווית 2");
lineDataSet2.setDrawCircles(false);
lineDataSet2.setColor(Color.GREEN);
lineDataSet2.setDrawValues(false);
lineDataSet2.setLineWidth(3);
lineDataSet.add(lineDataSet1);
lineDataSet.add(lineDataSet2);
lineChart2.setData(new LineData(lineDataSet));
lineChart2.setDrawBorders(true);
lineChart2.setBorderColor(0xffff00ff);
lineChart2.setBorderWidth(2);
lineChart2.setScaleEnabled(true);
//lineChart1.setDrawGridBackground(true);
//lineChart1.setGridBackgroundColor(0xffff00ff);
//lineChart1.setBackgroundColor(0x00000000);
XAxis xAxis = lineChart2.getXAxis();
//xAxis.setEnabled(true);
xAxis.setDrawAxisLine(true);
xAxis.setAxisLineColor(Color.WHITE);
lineChart2.getXAxis().setPosition(XAxis.XAxisPosition.BOTTOM);
lineChart2.getAxisRight().setEnabled(false);
lineChart2.getXAxis().setAxisMaximum(10);
lineChart2.getXAxis().setAxisMinimum(-10);
lineChart2.getXAxis().setGridColor(0xffff00ff);
//lineChart1.getXAxis().setDrawAxisLine(true);
//lineChart1.getXAxis().setAxisLineColor(Color.WHITE); // The buttom limit line of the chart
//lineChart1.setVisibleXRangeMaximum(50);
lineChart2.getXAxis().setTextColor(Color.WHITE);
lineChart2.getXAxis().setTextSize(15);
LimitLine ll = new LimitLine(0);
ll.setLineColor(Color.WHITE);
ll.setLineWidth(1);
xAxis.addLimitLine(ll);
YAxis yAxis = lineChart2.getAxisLeft();
yAxis.setDrawZeroLine(true);
yAxis.setZeroLineColor(Color.WHITE);// no grid lines
yAxis.setZeroLineWidth(1); //Sets the line-width of the zero line.
yAxis.setAxisMinimum(-10f); // start at zero
yAxis.setAxisMaximum(10f); // the axis maximum is 100
yAxis.setGridColor(0xffff00ff);
yAxis.setTextColor(Color.WHITE);
yAxis.setTextSize(15);
Legend legend = lineChart2.getLegend();
legend.setEnabled(true);
legend.setTextColor(Color.WHITE);
legend.setTextSize(18);
legend.setFormSize(13);
legend.setForm(Legend.LegendForm.CIRCLE);
legend.setHorizontalAlignment(Legend.LegendHorizontalAlignment.CENTER);
}
public void sendAndNext(View view) {
String temValue1= answer1.getText().toString();
//Toast.makeText(secondScreen.this, answer1.getText(),Toast.LENGTH_LONG).show();
String temValue2= answer2.getText().toString();
if (Integer.parseInt(temValue1)==mSlop[0] && Integer.parseInt(temValue2)==mSlop[1]){
Toast.makeText(Main2Activity.this, "תשובה נכונה",Toast.LENGTH_LONG).show();
}else {
Toast.makeText(Main2Activity.this, "תשובה לא נכונה או שלא הוזנו נתונים",Toast.LENGTH_LONG).show();
}
}
}
这是第二个 XML：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:weightSum="5"
android:gravity="top"
android:paddingTop="5dp"
android:paddingRight="5dp"
android:paddingBottom="5dp"
android:paddingLeft="5dp"
android:background="@drawable/background_color2">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="3.5"
android:paddingTop="5dp"
android:paddingRight="5dp"
android:paddingBottom="5dp"
android:paddingLeft="5dp">
<com.github.mikephil.charting.charts.LineChart
android:id="@+id/lineChart2"
android:layout_width="match_parent"
android:layout_height="400dp"
>
</com.github.mikephil.charting.charts.LineChart>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="0.5"
android:paddingTop="5dp"
android:paddingRight="5dp"
android:paddingBottom="5dp"
android:paddingLeft="5dp"
android:orientation="horizontal"
android:weightSum="2"
android:gravity="right">
<EditText
android:id="@+id/answer1"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="0.5"
android:digits="0123456789."
android:inputType="numberSigned"
android:maxLength="2"
android:hint="הכנס מספר"
android:textColorHint="#78ffd6"
android:textSize="18dp"
android:textColor="#00FFFF"
/>
<TextView
android:id="@+id/question1"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1.5"
android:paddingRight="5dp"
android:paddingLeft="5dp"
android:text="למה שווה הפרמטר b ?"
android:textColor="#00FFFF"
android:textSize="25sp"
>
</TextView>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="0.5"
android:paddingTop="5dp"
android:paddingRight="5dp"
android:paddingBottom="5dp"
android:paddingLeft="5dp"
android:orientation="horizontal"
android:weightSum="2"
android:gravity="right"
>
<EditText
android:id="@+id/answer2"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="0.5"
android:digits="0123456789."
android:maxLength="2"
android:hint="הכנס מספר"
android:textColorHint="#64f38c"
android:textSize="18dp"
android:inputType="numberSigned"
android:textColor="#ff00ff00"
/>
<TextView
android:id="@+id/question2"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1.5"
android:text="מהי נק' החיתוך עם ציר Y?"
android:textColor="#ff00ff00"
android:textSize="25sp"
>
</TextView>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="0.5"
android:paddingTop="5dp"
android:paddingRight="5dp"
android:paddingBottom="5dp"
android:paddingLeft="5dp"
android:orientation="horizontal"
android:weightSum="2"
android:gravity="center">
<Button
android:layout_marginRight="40dp"
android:id="@+id/quickTipBtn"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:text="Quick Tip"
android:background="@android:color/transparent"
android:textColor="#f05053"
/>
<Button
android:id="@+id/sendAndNext"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:text="Next One"
android:background="@android:color/transparent"
android:textColor="#ffafbd"
android:onClick="sendAndNext"/>
</LinearLayout>
</LinearLayout>
这是 Logcat 错误：
致命异常：主要
进程：com.example.rachmani.mythematix_linears，PID：18087 java.lang.RuntimeException：无法启动活动 组件信息{com.example.rachmani.mythematix_linears/com.example.rachmani.mythematix_linears.Main2Activity}： android.view.InflateException：二进制 XML 文件第 0 行：错误 膨胀类
【问题讨论】：
-
您的意思是“崩溃”应用程序吗？ ;)
-
您需要从设备获取错误日志。
-
请提供崩溃报告
-
来自 Logcat？
-
@RonenRachmani 是的！