I want to put a text in a TextView sequentially, with a known time between characters, from a written text in an EditText
That is the solution I made: I wrote two ArrayList charged from an EditText, the first one with Characters from the EditText , the second one with Integers for determine the time between characters. Then I parse the ArrayLists, times load of the time integers are done sequentially, but not the characters, the TextViews are drawn only when the cycle ends.
My code The MainActivity:
import java.util.ArrayList;
import android.os.Bundle;
import android.app.Activity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class MainActivity extends Activity {
private TextView showCharacter;
private TextView showAppendCharacter;
private EditText incomingText;
private Button readTextEdit;
private ArrayList<CharSequence> toText = new ArrayList<CharSequence>();
private ArrayList<Integer> timePlay = new ArrayList<Integer>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
showCharacter = (TextView) findViewById(R.id.showCharacterTextView);
showAppendCharacter = (TextView) findViewById(R.id.showAppendCharacterTextView);
incomingText = (EditText) findViewById(R.id.incomingEditText);
readTextEdit = (Button) findViewById(R.id.readTextButton);
readTextEdit.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
toText.clear();
timePlay.clear();
showAppendCharacter.setText("");
String text = incomingText.getText().toString();
for (int base = 0; base < text.length(); base++) {
if (String.valueOf(text.charAt(base)).equals("a")) {
toText.add(("a"));
timePlay.add(500);
} else if (String.valueOf(text.charAt(base)).equals("b")) {
toText.add(("b"));
timePlay.add(650);
} else if (String.valueOf(text.charAt(base)).equals("c")) {
toText.add(("c"));
timePlay.add(800);
} else {
toText.add(("_"));
timePlay.add(1000);
}
}
for (int pos = 0; pos < toText.size(); pos++) {
try {
Thread.sleep(timePlay.get(pos));
showCharacter.setText((String) toText.get(pos));
showAppendCharacter.append((String) toText.get(pos));
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
});
}
}
The activity_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/LinearLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity" >
<TextView
android:id="@+id/showCharacterTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/showCharacterTextView"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="@+id/showAppendCharacterTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/showAppendCharactersTextView"
android:textAppearance="?android:attr/textAppearanceLarge" />
<EditText
android:id="@+id/incomingEditText"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:hint="@string/incomingTextEditText"
android:inputType="text" >
<requestFocus />
</EditText>
<Button
android:id="@+id/readTextButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/readButton" />
The strings.xml:
<?xml version="1.0" encoding="utf-8"?>
<string name="app_name">texto Desde ArrayList</string>
<string name="action_settings">Settings</string>
<string name="showCharacterTextView">Show last Character</string>
<string name="showAppendCharactersTextView">Show append Characters</string>
<string name="incomingTextEditText">Incoming text</string>
<string name="readButton">Read text</string>
Try something like this... You can get rid of the Arraylists. Remember a String is basically an array of chars. create a custom text view that implements runnable so the work that your trying to do with the text is not done on the main thread.
package com.example.stackquestion;
import java.util.ArrayList;
import android.content.Context;
import android.graphics.Color;
import android.os.SystemClock;
import android.util.AttributeSet;
import android.widget.TextView;
public class CustomTextView extends TextView implements Runnable {
String text = null;
int i = 0;
int length = 0;
String currentText = "";
public CustomTextView(Context context, AttributeSet attrs) {
super(context, attrs);
reset();
}
@Override
public void run() {
if (i < length) {
currentText = currentText + text.charAt(i);
setText(currentText);
if (text.charAt(i) == 'a') {
postDelayed(this, 500);
} else if (text.charAt(i) == 'b') {
postDelayed(this, 650);
} else if (text.charAt(i) == 'c') {
postDelayed(this, 800);
} else if (text.charAt(i) == '_') {
postDelayed(this, 1000);
} else
postDelayed(this, 1);
i++;
}
}
public void setString(String text) {
this.text = text;
this.length = text.length();
}
public void reset() {
currentText = "";
text = null;
i = 0;
setText("");
}
}
Here is the main Activity
package com.example.stackquestion;
import java.util.ArrayList;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class MainActivity extends Activity {
private TextView showCharacter;
private CustomTextView showAppendCharacter;
private EditText incomingText;
private Button readTextEdit;
private ArrayList<CharSequence> toText = new ArrayList<CharSequence>();
private ArrayList<Integer> timePlay = new ArrayList<Integer>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
showCharacter = (TextView) findViewById(R.id.showCharacterTextView);
showAppendCharacter = (CustomTextView) findViewById(R.id.showAppendCharacterTextView);
incomingText = (EditText) findViewById(R.id.incomingEditText);
readTextEdit = (Button) findViewById(R.id.readTextButton);
readTextEdit.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (v.getId() == R.id.readTextButton)
showAppendCharacter.reset();
showAppendCharacter
.setString(incomingText.getText().toString());
showAppendCharacter.run();
}
});
}
}
woops. I forgot to give you the Layout. But looks like you got it. Just change the type of textview to a fully qualified CustomTextView. Here was mine.
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/LinearLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity" >
<TextView
android:id="@+id/showCharacterTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/showCharacterTextView"
android:textAppearance="?android:attr/textAppearanceLarge" />
<com.example.stackquestion.CustomTextView
android:id="@+id/showAppendCharacterTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/showAppendCharactersTextView"
android:textAppearance="?android:attr/textAppearanceLarge" />
<EditText
android:id="@+id/incomingEditText"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:hint="@string/incomingTextEditText"
android:inputType="text" >
<requestFocus />
</EditText>
<Button
android:id="@+id/readTextButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/readButton" />
</LinearLayout>