英文:
Get string line by line android programmatically
问题
以下是您要翻译的部分：
原文：
I have this code but the problem is that this continually showing toast of each string line when I pressed my desired button.
Like this:
Clicked the button once:
Toast shows continually:
A
B
C
What I want is to get string from a single line once I click the button.
Like this:
EditText value:
A
B
C
Result first click:
A only
Result second click:
B only
Result third click:
C only
Like that
Btw this is the code I use:
Button checkButton = (Button) findViewById(R.id.check_Button);
checkButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
EditText editBox = (EditText) findViewById(R.id.edit_Text);
String items = editBox.getText().toString();
Scanner scanner = new Scanner(items);
while (scanner.hasNextLine()) {
String line = scanner.nextLine();
Toast.makeText(getApplicationContext(), line, Toast.LENGTH_SHORT).show();
}
scanner.close();
}
}
);
I know it's hard to understand but please bare with me.
翻译：
我有这段代码，但问题是每当我按下所需按钮时，它会持续显示每个字符串行的提示。
像这样：
单击按钮一次：
提示不断显示：
A
B
C
我想要的是，一旦我点击按钮，就从单行获取字符串。
像这样：
EditText 值：
A
B
C
第一次点击结果：
仅 A
第二次点击结果：
仅 B
第三次点击结果：
仅 C
就像这样
顺便说一下，这是我使用的代码：
Button checkButton = (Button) findViewById(R.id.check_Button);
checkButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
EditText editBox = (EditText) findViewById(R.id.edit_Text);
String items = editBox.getText().toString();
Scanner scanner = new Scanner(items);
while (scanner.hasNextLine()) {
String line = scanner.nextLine();
Toast.makeText(getApplicationContext(), line, Toast.LENGTH_SHORT).show();
}
scanner.close();
}
}
);
我知道这很难理解，但请谅解。
英文:
I have this code but the problem is that this continually showing toast of each string line when I pressed my desired button.
Like this:
Clicked the button once:
Toast shows continually:
A
B
C
What I want is to get string from a single line once I click the button.
Like this:
EditText value:
A
B
C
Result first click:
A only
Result second click:
B only
Result third click:
C only
Like that
Btw this is the code I use:
Button checkButton = (Button) findViewById(R.id.check_Button);
checkButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
EditText editBox = (EditText) findViewById(R.id.edit_Text);
String items = editBox.getText().toString();
Scanner scanner = new Scanner(items);
while (scanner.hasNextLine()) {
String line = scanner.nextLine();
Toast.makeText(getApplicationContext(), line, Toast.LENGTH_SHORT).show();
}
scanner.close();
}
}
);
I know it's hard to understand but please bare with me.
答案1
得分: 0
我认为你可以采用这样的方法。
int clicks = 0;
Button checkButton = (Button) findViewById(R.id.check_Button);
checkButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
EditText editBox = (EditText) findViewById(R.id.edit_Text);
String items = editBox.getText().toString();
if (i == 0) {
Toast.makeText(getApplicationContext(), items, Toast.LENGTH_LONG).show();
i++;
editBox.setText("");
} else if (i == 1) {
Toast.makeText(getApplicationContext(), items, Toast.LENGTH_LONG).show();
i++;
editBox.setText("");
} else if (i == 2) {
Toast.makeText(getApplicationContext(), items, Toast.LENGTH_LONG).show();
i = 0;
}
}
});
当值在单击按钮后重置时，只需在editText中输入一个值。
英文:
I think you can go for an approach like this.
int clicks = 0;
Button checkButton = (Button) findViewById(R.id.check_Button);
checkButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
EditText editBox = (EditText) findViewById(R.id.edit_Text);
String items = editBox.getText().toString();
if (i == 0) {
Toast.makeText(getApplicationContext(), items , Toast.LENGTH_LONG).show();
i++;
editBox.setText("");
} else if (i == 1) {
Toast.makeText(getApplicationContext(), items , Toast.LENGTH_LONG).show();
i++;
editBox.setText("");
} else if (i==2) {
Toast.makeText(getApplicationContext(), items , Toast.LENGTH_LONG).show();
i = 0;
}
}
}
Just enter a value in the editText when the value is reset after a single button click.
答案2
得分: 0
int position = 0;
EditText editText = findViewById(R.id.editText);
editText.addTextChangedListener(new TextWatcher() {
public void afterTextChanged(Editable editable) {
}
public void beforeTextChanged(CharSequence charSequence, int i, int i2, int i3) {
}
public void onTextChanged(CharSequence charSequence, int i, int i2, int i3) {
if(charSequence.length()<=0)
{
position = -1;
}
else{
position = 0;
}
}
});
Button button = findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener(){
public void onClick(View v){
int length = editText.getText().length();
if(position == -1){
Toast.makeText(getApplicationContext(),"Nothing in EditText box",Toast.LENGTH_LONG).show();
return;
}
if(position == length){
position = 0;
}
Toast.makeText(getApplicationContext(),String.valueOf(editText.getText().charAt(position)),Toast.LENGTH_LONG).show();
position++;
}
});
英文:
int position=0;
EditText editText=findViewById(R.id.editText);
editText.addTextChangedListener(new TextWatcher() {
public void afterTextChanged(Editable editable) {
}
public void beforeTextChanged(CharSequence charSequence, int i, int i2, int i3) {
}
public void onTextChanged(CharSequence charSequence, int i, int i2, int i3) {
if(charSequence.length()<=0)
{
position=-1;
}
else{
position=0;
}
}
});
Button button=findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener(){
public void onClick(View v){
int length=editText.getText().length();
if(position==-1){
Toast.makeText(getApplicationContext(),"Nothing in EditText box",Toast.LENGTH_LONG).show();
return;
}
if(position==length){
position=0;
}
Toast.makeText(getApplicationContext(),editText.getText().charAt(position),Toast.LENGTH_LONG).show();
position++;
}
});
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