我在 MainActivity 的布局中实现了几个按钮、SPINNER 和 EditText，但是，我尝试了几种方法将我的位图从微调器（MainActivity 类）检索到 CustomView，但失败了。请帮帮我！任何帮助是极大的赞赏！谢谢！
文本活动.java
package com.example.textdrawn2;
import android.os.Bundle;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.Paint;
import android.graphics.Typeface;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.AdapterView.OnItemSelectedListener;
public class TextActivity extends Activity{
TextView tv;
ImageView iv;
EditText et;
Button b;
public static Bitmap bmap;
Paint paint;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_text);
//Initialise editText, textView & Button
et = (EditText) findViewById(R.id.editText1);
tv = (TextView) findViewById(R.id.textView1);
//Spinner (getting texts to be displayed inside drop down box)
Spinner fontspinner = (Spinner) findViewById(R.id.fonts_spinner);
// Create an ArrayAdapter using the string array and a default spinner layout
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this,
R.array.fonts_array, android.R.layout.simple_spinner_item);
// Specify the layout to use when the list of choices appears
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
// Apply the adapter to the spinner
fontspinner.setAdapter(adapter);
//Initialise Spinner
Spinner fonts_sp;
fonts_sp = (Spinner) findViewById(R.id.fonts_spinner);
fonts_sp.setOnItemSelectedListener(myListener);
}
OnItemSelectedListener myListener = new OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> parent, View view,
int pos, long id) {
//Initialise Button, ET and TV
Button b = (Button) findViewById(R.id.btnText);
et = (EditText) findViewById(R.id.editText1);
tv = (TextView) findViewById(R.id.textView1);
//iv = (ImageView) findViewById(R.id.imageView1);
//To enable program to switch to a different font
switch(pos) {
case 0: // When user select Code 39 font
b.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View view) {
if (et.getText().toString().equals("")) {
//Clear textView
tv.setText("");
et.setText("");
tv.buildDrawingCache();
iv.setImageBitmap(tv.getDrawingCache());
}
else {
//To change to Code 39 barCode font
Typeface df = Typeface.createFromAsset(getAssets(),
"fonts/IDAutomationHC39M_FREE.otf");
TextView tv1 = (TextView) findViewById(R.id.textView1);
tv1.setTypeface(df);
String editTextValue = et.getText().toString();
tv.setText(editTextValue);
ImageView iv = (ImageView) findViewById(R.id.imageView1);
tv.buildDrawingCache();
bmap = tv.getDrawingCache();
iv.setImageBitmap(bmap);
}
}
});
break;
case 1: // When user select Code 128 font
b.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View view) {
if (et.getText().toString().equals("")) {
//Clear textView
tv.setText("");
et.setText("");
tv.buildDrawingCache();
iv.setImageBitmap(tv.getDrawingCache());
}
else {
//To change to Code 128 barCode font
Typeface df = Typeface.createFromAsset(getAssets(),
"fonts/code128.ttf");
TextView tv1 = (TextView) findViewById(R.id.textView1);
tv1.setTypeface(df);
String editTextValue = et.getText().toString();
tv.setText(editTextValue);
tv.buildDrawingCache();
iv.setImageBitmap(tv.getDrawingCache());
}
}
});
break;
case 2: // When user select MOLOT font
b.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View view) {
if (et.getText().toString().equals("")) {
//Clear textView
tv.setText("");
et.setText("");
tv.buildDrawingCache();
iv.setImageBitmap(tv.getDrawingCache());
}
else {
//To change to Code 39 barCode font
Typeface df = Typeface.createFromAsset(getAssets(),
"fonts/Molot.otf");
TextView tv1 = (TextView) findViewById(R.id.textView1);
tv1.setTypeface(df);
String editTextValue = et.getText().toString();
tv.setText(editTextValue);
tv.buildDrawingCache();
iv.setImageBitmap(tv.getDrawingCache());
}
}
});
break;
Text.Java(自定义视图)
public class Text extends View implements OnTouchListener {
Typeface fonts ;
public Text(Context context,AttributeSet attrs) {
super(context, attrs);
//fonts = Typeface.createFromAsset(context.getAssets(), "Molot.otf");
//et = (EditText) findViewById(R.id.editText1);
}
@Override
public void onDraw(Canvas canvas) {
super.onDraw(canvas);
canvas.drawColor(Color.BLUE);
//canvas.drawBitmap(bmap, 0, 100, null);
}
@Override
public boolean onTouch(View v, MotionEvent event) {
return true;
}
}