相关疑难解决方法(0)

我开始一个测试项目只是为了解决这个问题.没有对main.xml的更改.我想创建一个小部件大小的ImageView(80x100),其中包含从TextView转换的位图.是的,这听起来非常迂回,但这只是为了测试; 最后,我希望ImageView有一个背景图像和多个TextViews.我不确定我做错了什么,但没有任何东西被推到屏幕上.

声明TextView/ImageView并在构造函数中传递"this"是一个问题吗？这是我的layoutParams的问题吗？这是代码:

package com.doaf.testproject;

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;

public class TestProject extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        TextView tv = new TextView(this);
        LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(80, 100);
        tv.setLayoutParams(layoutParams);
        tv.setText("testing 1 2 3");
        tv.setTextColor(0xFFFFFF);
        tv.setBackgroundColor(0x555555);

        Bitmap testB;
        testB = loadBitmapFromView(tv);

        ImageView iv = new ImageView(this);
        iv.setLayoutParams(layoutParams);
        iv.setBackgroundColor(0x555555);
        iv.setImageBitmap(testB);

        setContentView(iv);
    }

    public static Bitmap loadBitmapFromView(View …